{"title":"Sensors, Switches \u0026 Wiring Harnesses (Engine)","description":null,"products":[{"product_id":"delco-est-distributor-coil-to-module-harness-fits-engines-with-a-delco-est-distributor-sierra-18-5515","title":"Sierra 18-5515 EST Distributor Coil to Module Harness for Delco EST Distributor","description":"\u003cp\u003eThe Sierra 18-5515 is a Delco EST Distributor Coil to Module Harness built to connect the ignition coil to the distributor module on engines equipped with a Delco EST distributor. This harness carries the low-voltage signal and power connections between the coil and the EST module, and is the correct replacement when the factory wiring on this circuit has corroded, chafed, or failed from heat and vibration in the engine compartment. The wiring uses copper conductors insulated with polyvinyl chloride (PVC) jacketing for durability in a marine engine environment, and terminates in Rj-series connectors for a direct plug-in fit at the coil and module.\u003c\/p\u003e\u003cp\u003eAs a Sierra part, the 18-5515 is engineered to meet or exceed the original equipment part it replaces and is backed by Sierra's Industry Leading Customer Satisfaction Warranty. It is intended as a straightforward, direct-fit replacement for engines equipped with a Delco EST distributor, restoring a reliable coil-to-module connection without splicing into or modifying the factory harness.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-5515\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Distributor Coil to Module Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Engines equipped with a Delco EST Distributor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper, Polyvinyl Chloride (PVC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Rj-series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 1.77 x 7.01 x 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282361075\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eEngines equipped with a Delco EST Distributor\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5515 connect?\u003c\/strong\u003e The Sierra 18-5515 is a wiring harness that connects the ignition coil to the distributor module on engines equipped with a Delco EST distributor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness fit any marine engine?\u003c\/strong\u003e The 18-5515 is designed for engines equipped with a Delco EST distributor; it is not a universal fit for engines using other distributor types.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-5515 harness made of?\u003c\/strong\u003e It uses copper conductors with polyvinyl chloride (PVC) insulation, chosen for durability in a marine engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat connector type does the 18-5515 use?\u003c\/strong\u003e The harness terminates in Rj-series connectors for a direct plug-in connection at the coil and module.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5515 weigh?\u003c\/strong\u003e The Sierra 18-5515 EST Distributor Coil to Module Harness weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-5515 harness?\u003c\/strong\u003e The 18-5515 measures 1.77 x 7.01 x 5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5515 an OEM or aftermarket part?\u003c\/strong\u003e The 18-5515 is a Sierra-branded aftermarket harness engineered to meet or exceed the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the coil to module harness?\u003c\/strong\u003e Replace the 18-5515 when the factory coil-to-module wiring on a Delco EST distributor shows corrosion, chafing, or failure that causes an intermittent or lost ignition signal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-5515 come with a warranty?\u003c\/strong\u003e Yes, the 18-5515 is covered under Sierra's Industry Leading Customer Satisfaction Warranty against defects in workmanship and materials for the useful life of the product.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-5515 harness straightforward?\u003c\/strong\u003e The 18-5515 is a direct plug-in replacement between the coil and the Delco EST distributor module, so it does not require splicing into the factory wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the Sierra 18-5515?\u003c\/strong\u003e The product is the coil to module wiring harness itself, part number 18-5515, ready to connect at the coil and distributor module.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988218261723,"sku":"SIE-18-5515","price":31.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5515__49993.1686574175.500.750.jpg?v=1785188058"},{"product_id":"sierra-18-7556-crankshaft-sensor-for-mercury-5-0l-6-2l-inboard-1998-2010-replaces-864297001","title":"Sierra Crankshaft Sensor 18-7556 for Mercury 5.0L\/6.2L 1998-2010, Replaces 864297001","description":"\u003cp\u003eThe Sierra 18-7556 Crankshaft Sensor is a direct-fit replacement crankshaft position sensor built for Mercury 5.0L and 6.2L inboard engines from 1998-2010. This sensor mounts to the engine block via a flange mount and monitors crankshaft position to help the ignition system deliver accurate spark timing, a critical function for smooth starting, stable idle, and consistent engine performance. The housing is constructed of metal and is rated to withstand temperatures up to 400 degrees Fahrenheit, standing up to the heat and vibration found in the engine compartment. Each unit ships as a single sensor, ready to install as a one-for-one swap for a failed or worn factory sensor. Sierra builds every replacement part to meet or exceed the specification of the original equipment part it replaces, so performance and fit match what the engine was designed around. This sensor directly replaces Mercruiser Stern Drive part number 864297001 and is intended for boat owners and marine technicians servicing Mercury 5.0L and 6.2L inboard powerplants within the 1998-2010 range. Before ordering, confirm the sensor matches your engine's original equipment specification.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7556\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Crankshaft Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 3.5 x 3.5 x 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.14 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Flange Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Push Button\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper Temperature Rating:\u003c\/strong\u003e 400 Degrees Fahrenheit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282340834\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e One crankshaft sensor\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury 5.0L, 6.2L, 1998-2010\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e864297001\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-7556 crankshaft sensor fit?\u003c\/strong\u003e The 18-7556 fits Mercury 5.0L and 6.2L inboard engines built from 1998 through 2010.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does this sensor replace?\u003c\/strong\u003e It is a direct replacement for OEM part number 864297001.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the crankshaft sensor made of?\u003c\/strong\u003e The 18-7556 sensor housing is metal, built to hold up to engine-bay heat and vibration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the sensor mount to the engine?\u003c\/strong\u003e It uses a flange mount, matching the original equipment mounting configuration on Mercury 5.0L and 6.2L blocks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat temperature can the sensor withstand?\u003c\/strong\u003e The 18-7556 carries an upper temperature rating of 400 degrees Fahrenheit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-7556 sensor?\u003c\/strong\u003e It measures 3.5 x 3.5 x 1.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the crankshaft sensor weigh?\u003c\/strong\u003e The Sierra 18-7556 weighs 0.14 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e One Sierra 18-7556 crankshaft sensor ships per order; no other hardware is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Mercury part or an aftermarket replacement?\u003c\/strong\u003e The 18-7556 is a Sierra aftermarket replacement, built to meet or exceed the specification of the original equipment sensor it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a crankshaft sensor do on these Mercury engines?\u003c\/strong\u003e On Mercury 5.0L and 6.2L inboard engines, the crankshaft sensor monitors crankshaft position so the ignition system can time spark correctly, which affects starting and idle quality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould I confirm fitment before ordering?\u003c\/strong\u003e Yes, check that part number 18-7556 matches your engine's original crankshaft sensor specification before purchasing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988385214683,"sku":"SIE-18-7556","price":136.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-7556__51202.1558186390.500.750.jpg?v=1785188949"},{"product_id":"marine-coolant-temperature-sensor-for-mercruiser-replaces-oem-47002-sierra-18-7600","title":"Sierra Coolant Temperature Sensor 18-7600, Replaces Mercruiser 47002","description":"\u003cp\u003eThe Sierra 18-7600 is a coolant temperature sensor built as a direct replacement for Mercruiser temperature sensors. It threads into the engine cooling passage to monitor coolant temperature and send that reading to the gauge or engine control system, giving the operator an accurate, real-time view of engine operating temperature. Reliable temperature sensing is critical on a marine engine, where overheating can cause serious damage before a problem is visually apparent, so a correctly functioning sensor is one of the simpler but more important components in the cooling and instrumentation system.\u003c\/p\u003e\u003cp\u003eThis sensor is designed as a direct cross-reference for the OEM part it replaces, so installation follows the same fit, thread, and electrical connection as the original Mercruiser sensor it is replacing. It is cataloged under Mercruiser temperature and oil sender applications, making it a straightforward swap for boat owners and marine technicians performing routine sender replacement or troubleshooting an inaccurate temperature gauge. At 0.12 pounds, it is a compact, lightweight component that is easy to keep on hand as a spare.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7600\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Coolant Temperature Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Temp \u0026amp; Oil Senders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999977076\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.12 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Mercruiser temperature and oil sender applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e47002\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7600 replace?\u003c\/strong\u003e The Sierra 18-7600 coolant temperature sensor is a direct replacement for Mercruiser part number 47002.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-7600 used for?\u003c\/strong\u003e It is a coolant temperature sensor that monitors engine coolant temperature and sends that reading to the gauge or engine control system on Mercruiser applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-7600 sensor weigh?\u003c\/strong\u003e The Sierra 18-7600 weighs 0.12 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-7600 an OEM or aftermarket part?\u003c\/strong\u003e The 18-7600 is a Sierra-branded replacement sensor cataloged as a cross-reference to Mercruiser OEM part 47002, so it serves as an aftermarket equivalent to the original sender.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of sender is the 18-7600?\u003c\/strong\u003e Sierra part 18-7600 is cataloged under Mercruiser temperature and oil senders.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-7600 fit any boat engine?\u003c\/strong\u003e The Sierra 18-7600 is cataloged specifically as a Mercruiser temperature sender replacing part number 47002; confirm your existing sensor's part number before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-7600?\u003c\/strong\u003e The UPC for the Sierra 18-7600 coolant temperature sensor is 030999977076.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace a coolant temperature sensor like the 18-7600?\u003c\/strong\u003e A failing coolant temperature sensor can cause an inaccurate or unresponsive temperature gauge reading, and replacing it with the Sierra 18-7600 restores accurate engine temperature monitoring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-7600 include mounting hardware?\u003c\/strong\u003e The Sierra 18-7600 is supplied as the sensor itself; no additional components are listed with it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my sensor matches the 18-7600?\u003c\/strong\u003e Check your existing sender for the Mercruiser part number 47002, which is the number the Sierra 18-7600 is cataloged to replace.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988385247451,"sku":"SIE-18-7600","price":45.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-7600_lg__47159.1558129827.500.750.jpg?v=1785329155"},{"product_id":"sierra-18-7630-throttle-position-sensor-replaces-oem-47032","title":"Sierra 18-7630 Throttle Position Sensor for 5.7L 350 V-8 EFI Marine Engines","description":"\u003cp\u003eThe Sierra 18-7630 is a throttle position sensor built for 5.7L 350 cubic inch V-8 EFI marine engines. Mounted to the throttle body, this sensor tracks the position of the throttle valve and sends a continuous electrical signal to the engine control module so the engine management system can adjust fuel delivery and ignition timing in real time as the throttle is opened and closed. A throttle position sensor that reads out of range or fails intermittently is a common cause of rough idle, hesitation on acceleration, or stored fault codes, making the 18-7630 a straightforward diagnostic and maintenance replacement for boat owners running fuel-injected 5.7L 350 V-8 engines.\u003c\/p\u003e\u003cp\u003eThis part is engineered to match OEM electrical and mechanical specifications for its application, so it installs in the factory sensor location without modification. It is intended as a direct service replacement rather than a universal or aftermarket-style substitute, keeping the throttle-to-ECM signal path within factory tolerances.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7630\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Throttle Position Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999977106\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 5.7L 350 cubic inch V-8 EFI marine engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e5.7L EFI, 5.7L 350 V-8, model years 1995-1997, serial number range F225560 - K999999\u003c\/li\u003e\n\u003cli\u003e5.7L EFI (GEN +), 5.7L 350 V-8, model years 1998-2001, serial number range L010035 - M299999\u003c\/li\u003e\n\u003cli\u003e5.7L EFI MIE (GEN +), 5.7L 350 V-8, model year 1997, serial number range K040300 - K999999\u003c\/li\u003e\n\u003cli\u003e5.7LX Bravo EFI (GEN +), 5.7L 350 V-8, model years 1996-1997, serial number range F800300 - K999999\u003c\/li\u003e\n\u003cli\u003e5.7LX EFI, 5.7L 350 V-8, model years 1995-1997, serial number range F225560 - K999999\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7630 throttle position sensor do?\u003c\/strong\u003e It mounts to the throttle body of a 5.7L 350 V-8 EFI marine engine and sends a continuous signal to the engine control module reporting throttle valve position, which the ECM uses to adjust fuel delivery and timing as the throttle opens and closes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines does the 18-7630 fit?\u003c\/strong\u003e The Sierra 18-7630 fits 5.7L 350 cubic inch V-8 EFI marine engines, including the 5.7L EFI, 5.7L EFI (GEN +), 5.7L EFI MIE (GEN +), 5.7LX Bravo EFI (GEN +), and 5.7LX EFI engine families within their listed serial number ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-7630 weigh?\u003c\/strong\u003e The Sierra 18-7630 throttle position sensor weighs 0.05 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-7630 a direct OEM-fit replacement?\u003c\/strong\u003e Yes, the Sierra 18-7630 is built to match OEM mechanical and electrical specifications so it installs in the factory throttle position sensor location on covered 5.7L 350 V-8 EFI engines without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat year range does the 18-7630 cover?\u003c\/strong\u003e Coverage depends on the specific engine family: 1995-1997 for the 5.7L EFI and 5.7LX EFI, 1996-1997 for the 5.7LX Bravo EFI (GEN +), 1997 for the 5.7L EFI MIE (GEN +), and 1998-2001 for the 5.7L EFI (GEN +), each within a specific serial number range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace a throttle position sensor?\u003c\/strong\u003e A failing or out-of-range throttle position sensor like the 18-7630 commonly causes rough idle, hesitation on acceleration, or stored engine fault codes on 5.7L 350 V-8 EFI marine engines, since the ECM can no longer accurately track throttle position.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-7630 use its own serial number range to confirm fitment?\u003c\/strong\u003e Yes, each covered engine family has a specific serial number range, for example F225560 - K999999 for the 5.7L EFI and 5.7LX EFI engines, and confirming your engine's serial number against these ranges ensures the 18-7630 is the correct sensor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the 18-7630?\u003c\/strong\u003e The Sierra 18-7630 is sold as the throttle position sensor unit itself for installation on the throttle body of a covered 5.7L 350 V-8 EFI marine engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-7630 fit a Black Scorpion 350 V-8?\u003c\/strong\u003e No, the Black Scorpion 350 V-8 applications listed in Sierra fitment data use different sensor part numbers, so the 18-7630 is not the listed sensor for Black Scorpion engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-7630 a genuine Sierra part or an aftermarket substitute?\u003c\/strong\u003e The 18-7630 is a Sierra-branded throttle position sensor manufactured to OEM specification for the covered 5.7L 350 V-8 EFI engines, not a generic aftermarket substitute.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988385640667,"sku":"SIE-18-7630","price":60.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-7630_lg__78285.1558130863.500.750.jpg?v=1785329146"},{"product_id":"sierra-18-7697-idle-air-control-iac-motor-replaces-oem-r084003-marine-efi-fuel-injection","title":"Sierra 18-7697 Idle Air Control Motor, Replaces R084003","description":"\u003cp\u003eThe Sierra 18-7697 is an Idle Air Control (IAC) Motor, a replacement component for the engine's idle air control system that helps maintain steady idle speed. It is engineered as a direct replacement for OEM number R084003, making it a straightforward swap when the factory unit fails or wears out. The unit is finished in white and is compact, sized at 0.39 x 0.39 x 0.39 inches, with no batteries required for operation. Sierra International builds this IAC motor to be a drop-in replacement, and the package includes the IAC motor itself, ready for installation in place of the original component.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7697\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Idle Air Control Motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.26 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 1 cubic centimeter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBatteries Required:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e IAC Motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282287252\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eR084003\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7697 Idle Air Control Motor do?\u003c\/strong\u003e The Sierra 18-7697 is an Idle Air Control (IAC) Motor, a component in the idle air control system that helps regulate the engine's idle speed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7697 replace OEM part R084003?\u003c\/strong\u003e Yes, Sierra 18-7697 is a direct replacement for OEM number R084003.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this IAC motor?\u003c\/strong\u003e The Sierra 18-7697 measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-7697 IAC Motor weigh?\u003c\/strong\u003e It weighs 0.26 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-7697 IAC Motor?\u003c\/strong\u003e It is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-7697 a genuine Sierra part?\u003c\/strong\u003e Yes, it is manufactured by Sierra International under part number 18-7697.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7697 IAC Motor require batteries?\u003c\/strong\u003e No, the Sierra 18-7697 does not require batteries to operate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when you order the 18-7697?\u003c\/strong\u003e The package includes the IAC Motor itself, part number 18-7697.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-7697 IAC Motor?\u003c\/strong\u003e The UPC for this part is 808282287252.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988385738971,"sku":"SIE-18-7697","price":89.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-7697__64475.1722361800.500.750.jpg?v=1785188501"},{"product_id":"sierra-18-7632-1-idle-air-control-motor-replaces-oem-47033-marine-fuel-injection-iac-motor","title":"Sierra 18-7632-1 Idle Air Control Motor for 5.7L 350 V-8 EFI Marine Engines","description":"\u003cp\u003eThe Sierra 18-7632-1 Idle Air Control Motor is an electronic idle air control (IAC) motor built for 5.7L 350 cubic-inch V-8 EFI marine engines. It regulates the small amount of air that bypasses the throttle plate to maintain a stable idle speed as engine load and temperature change, a function that is critical on EFI-equipped inboard and sterndrive engines where idle quality directly affects starting, warm-up, and low-speed maneuvering. Sierra engineers this part to meet or exceed the specifications of the original equipment component it replaces, and Sierra supplies parts to OEM engine manufacturers and boat builders, so the 18-7632-1 is built to the same fit, form, and function expected on the water.\u003c\/p\u003e\u003cp\u003eThe motor measures 10.7 inches in length with a 1.2 inch outside diameter and a 0.6 inch nominal wall thickness, and it is finished in white. It is designed as a direct-fit replacement for the 5.7L EFI, 5.7L EFI GEN+, 5.7L EFI MIE GEN+, and 5.7LX Bravo EFI GEN+ engine families covered below, matching the mounting and electrical interface of the factory idle air control motor on these applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7632-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Idle Air Control Motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 10.7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 1.2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e 1.2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Wall Thickness:\u003c\/strong\u003e 0.6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282374457\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 5.7L 350 cubic inch V-8\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e5.7L EFI, 1995-1997, serial range F225560 - K999999\u003c\/li\u003e\n\u003cli\u003e5.7L EFI (GEN +), 1998-2001, serial range L010035 - M299999\u003c\/li\u003e\n\u003cli\u003e5.7L EFI MIE (GEN +), 1997, serial range K040300 - K999999\u003c\/li\u003e\n\u003cli\u003e5.7LX Bravo EFI (GEN +), 1996-1997, serial range F800300 - K999999\u003c\/li\u003e\n\u003cli\u003e5.7LX EFI, 1995-1997, serial range F225560 - K999999\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-7632-1 idle air control motor fit?\u003c\/strong\u003e The 18-7632-1 fits 5.7L 350 cubic inch V-8 EFI engines, specifically the 5.7L EFI (1995-1997, serial F225560 - K999999), 5.7L EFI GEN+ (1998-2001, serial L010035 - M299999), 5.7L EFI MIE GEN+ (1997, serial K040300 - K999999), 5.7LX Bravo EFI GEN+ (1996-1997, serial F800300 - K999999), and 5.7LX EFI (1995-1997, serial F225560 - K999999).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if this part fits my engine by serial number?\u003c\/strong\u003e Check your engine's serial number against the ranges listed for the 18-7632-1: F225560 - K999999 for the 1995-1997 5.7L EFI and 5.7LX EFI, L010035 - M299999 for the 1998-2001 5.7L EFI GEN+, K040300 - K999999 for the 1997 5.7L EFI MIE GEN+, and F800300 - K999999 for the 1996-1997 5.7LX Bravo EFI GEN+.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does an idle air control motor do?\u003c\/strong\u003e It regulates the amount of air bypassing the throttle plate to keep engine idle speed stable as load and temperature change. On the 5.7L 350 V-8 EFI engines this part fits, a failing idle air control motor typically causes a rough, high, or stalling idle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and finish is the 18-7632-1?\u003c\/strong\u003e The Sierra 18-7632-1 idle air control motor is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this idle air control motor?\u003c\/strong\u003e The 18-7632-1 measures 10.7 inches in length with a 1.2 inch outside diameter and a 0.6 inch nominal wall thickness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-7632-1 weigh?\u003c\/strong\u003e This idle air control motor weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-7632-1 a genuine OEM part or aftermarket?\u003c\/strong\u003e The 18-7632-1 is a Sierra-branded replacement part engineered to meet or exceed the specifications of the original equipment idle air control motor it replaces, rather than a part sold under the original engine manufacturer's brand.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this idle air control motor fit Bravo drive applications?\u003c\/strong\u003e Yes, the 18-7632-1 covers the 5.7LX Bravo EFI GEN+ application for 1996-1997, serial range F800300 - K999999, in addition to the non-Bravo 5.7L EFI applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-7632-1?\u003c\/strong\u003e Each order includes one Sierra 18-7632-1 idle air control motor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-7632-1 the same part for MIE engines?\u003c\/strong\u003e Yes, the same 18-7632-1 idle air control motor is listed for the 5.7L EFI MIE GEN+ engine application, 1997 model, serial range K040300 - K999999.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with this part?\u003c\/strong\u003e The Sierra 18-7632-1 idle air control motor has UPC 808282374457.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988385804507,"sku":"SIE-18-7632-1","price":105.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-7632-1__06236.1722492354.500.750.jpg?v=1785188395"},{"product_id":"sierra-18-7703-marine-knock-sensor-for-mercruiser-gm-v8-volvo-penta-stern-drives-replaces-805544t","title":"Sierra Knock Sensor 18-7703, Replaces 3854512, for Mercruiser GM V8 454\/502\/540\/572 CID and Volvo Penta 7.4L\/8.2L OMC Stern Drive","description":"\u003cp\u003eThe Sierra 18-7703 Knock Sensor is a direct-fit replacement engine sensor built for Mercruiser GM V8 stern drive engines (454, 502, 540, and 572 CID) as well as Volvo Penta 7.4L and 8.2L and OMC stern drive applications from 1999-2001. This sensor detects abnormal detonation (knock) inside the engine and sends that signal to the ECU so ignition timing can be adjusted, protecting the engine from damage caused by pre-ignition. It is constructed from metal for durability in the marine engine bay environment, with a measuring range of 60 to 120 dB to accurately pick up knock vibration across normal operating conditions. Each package includes one knock sensor, sized at a compact 0.39 x 0.39 x 0.39 inches for easy installation in the factory sensor location. As a Sierra product, it is engineered to meet or exceed the performance of the original equipment sensor it replaces, giving boat owners and marine technicians a reliable option for maintenance or repair work. The 18-7703 is a straightforward bolt-in replacement for the OEM 3854512 knock sensor, making it a practical choice when servicing GM V8 based stern drive powerplants across Mercruiser, Volvo Penta, and OMC applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7703\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Volvo Penta Fuel Injectors \u0026amp; Knock Sensors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282287429\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.26 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring Range:\u003c\/strong\u003e 60 - 120 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal Fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1 knock sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engines:\u003c\/strong\u003e Mercruiser GM V8 454, 502, 540, and 572 CID; Volvo Penta 7.4L\/8.2L and OMC stern drives (1999-2001)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser GM V8 engines: 454, 502, 540, and 572 CID\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 7.4L and 8.2L stern drives\u003c\/li\u003e\n\u003cli\u003eOMC stern drives (1999-2001)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3854512\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-7703 knock sensor fit?\u003c\/strong\u003e The Sierra 18-7703 knock sensor is built for Mercruiser GM V8 engines in the 454, 502, 540, and 572 CID range, as well as Volvo Penta 7.4L and 8.2L stern drives and OMC stern drives from 1999-2001.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-7703 replace?\u003c\/strong\u003e It replaces OEM part number 3854512, making the Sierra 18-7703 a direct bolt-in substitute for that original knock sensor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many sensors come in a package?\u003c\/strong\u003e One Sierra 18-7703 knock sensor is included per package, ready to install in place of the original sensor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the knock sensor made of?\u003c\/strong\u003e Metal construction is used for the Sierra 18-7703, giving it the durability needed to hold up in the marine engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the Sierra 18-7703 knock sensor?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches, a compact size designed to fit the factory sensor mounting location.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat detonation range can the sensor detect?\u003c\/strong\u003e The 18-7703 has a measuring range of 60 to 120 dB, allowing it to pick up abnormal engine knock across typical operating conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-7703 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-7703 is a Sierra aftermarket replacement sensor engineered to meet or exceed the performance of the original 3854512 equipment sensor it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this knock sensor work on a Volvo Penta stern drive?\u003c\/strong\u003e Yes, the Sierra 18-7703 is designed for Volvo Penta 7.4L and 8.2L stern drive engines in addition to Mercruiser GM V8 and OMC stern drive applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-7703 knock sensor weigh?\u003c\/strong\u003e The Sierra 18-7703 weighs 0.26 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a knock sensor do on a marine engine?\u003c\/strong\u003e A knock sensor like the Sierra 18-7703 detects abnormal detonation vibrations in the engine and signals the ECU to adjust ignition timing, helping prevent engine damage from pre-ignition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7703 fit OMC stern drives?\u003c\/strong\u003e Yes, the Sierra 18-7703 is designed for OMC stern drives from 1999-2001 in addition to its Mercruiser and Volvo Penta applications.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988385870043,"sku":"SIE-18-7703","price":64.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-7703__86393.1664543839.500.750.jpg?v=1785188784"},{"product_id":"throttle-position-sensor-for-mercruiser-mpi-replaces-853678t-sierra-18-7700-350-mag-mpi-mx6-2l-7-4l-mpi-l29-scorpion-tow-sports-575-sci","title":"Sierra Throttle Position Sensor 18-7700 for 350 V-8 and 377 V-8 Marine Engines","description":"\u003cp\u003eThe Sierra 18-7700 is a throttle position sensor built for a specific set of marine V-8 engine applications. The throttle position sensor monitors the position of the throttle plate and sends that signal to the engine management system, which uses it to control fuel delivery and ignition timing as the throttle is opened and closed. Keeping this sensor within factory specification is important for smooth throttle response, stable idle, and consistent acceleration.\u003c\/p\u003e\u003cp\u003eThe Sierra 18-7700 is designated for use on the Black Scorpion SKI 350 V-8 engine across three serial number ranges (model years 1996, 1997, and 1998), the 377 MAG 377 V-8 (2008-2010, serial A300000 and up), the 377 Scorpion SKI 377 V-8 (1997-1998, serial range K000656-L600314), and the MX 6.2L MPI 377 V-8 engine across three additional serial number ranges spanning 2002 through 2007. Because engine applications are broken out by serial number rather than model year alone, confirming the serial number on the engine tag against the ranges listed below is the reliable way to verify fit before ordering.\u003c\/p\u003e\u003cp\u003eThe sensor weighs 0.1 pounds and carries UPC 808282287269 for accurate identification when ordering or cross-checking inventory.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7700\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Throttle Position Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282287269\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBlack Scorpion SKI 350 V-8, 1996, serial F350583-K040000\u003c\/li\u003e\n\u003cli\u003eBlack Scorpion SKI 350 V-8, 1997, serial K040001-L002699\u003c\/li\u003e\n\u003cli\u003eBlack Scorpion SKI 350 V-8, 1998, serial L002700-L005600\u003c\/li\u003e\n\u003cli\u003e377 MAG 377 V-8, 2008-2010, serial A300000 \u0026amp; up\u003c\/li\u003e\n\u003cli\u003e377 Scorpion SKI 377 V-8, 1997-1998, serial K000656-L600314\u003c\/li\u003e\n\u003cli\u003eMX 6.2L MPI 6.2L 377 V-8, 2002-2004, serial M300000-W059999\u003c\/li\u003e\n\u003cli\u003eMX 6.2L MPI 6.2L 377 V-8, 2004-2007, serial W060000-A064824\u003c\/li\u003e\n\u003cli\u003eMX 6.2L MPI 6.2L 377 V-8, 2007, serial A064825-A299999\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNo OEM cross-reference numbers are listed for this part number.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-7700 throttle position sensor fit?\u003c\/strong\u003e The Sierra 18-7700 fits the Black Scorpion SKI 350 V-8, the 377 MAG 377 V-8, the 377 Scorpion SKI 377 V-8, and the MX 6.2L MPI 377 V-8, each within specific serial number ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-7700 fit a 1998 Black Scorpion SKI 350 V-8?\u003c\/strong\u003e Yes, for a 1998 Black Scorpion SKI 350 V-8 engine in the serial number range L002700-L005600, the 18-7700 is the correct throttle position sensor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7700 work on the MX 6.2L MPI 377 V-8?\u003c\/strong\u003e It does, across three serial number windows: M300000-W059999, W060000-A064824, and A064825-A299999, covering 2002 through 2007 production.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the weight of the Sierra 18-7700 throttle position sensor?\u003c\/strong\u003e This throttle position sensor weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-7700 an OEM part or an aftermarket replacement?\u003c\/strong\u003e Sierra 18-7700 is a Sierra-branded throttle position sensor built to the fitment specifications listed for its covered engine applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7700 fit a 1996 Black Scorpion SKI engine?\u003c\/strong\u003e Yes, the 1996 Black Scorpion SKI 350 V-8 in serial range F350583-K040000 is a listed application for the 18-7700 sensor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat serial number range applies to the 377 MAG application?\u003c\/strong\u003e For the 377 MAG 377 V-8, the 18-7700 applies to engines with serial number A300000 and up, covering 2008-2010.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7700 fit the 377 Scorpion SKI engine?\u003c\/strong\u003e Yes, on the 377 Scorpion SKI 377 V-8, the 18-7700 covers the 1997-1998 serial number range K000656-L600314.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this throttle position sensor?\u003c\/strong\u003e The UPC for the Sierra 18-7700 throttle position sensor is 808282287269.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm my engine matches the listed fitment for the 18-7700?\u003c\/strong\u003e Since the 18-7700 fitment is broken out by serial number rather than model year alone, check the engine's serial number tag against the specific ranges listed for the Black Scorpion SKI, 377 MAG, 377 Scorpion SKI, or MX 6.2L MPI applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a throttle position sensor like the 18-7700 do?\u003c\/strong\u003e A throttle position sensor tracks the angle of the throttle plate and reports it to the engine's fuel and ignition management system, which the 18-7700 is built to do on its listed V-8 marine engine applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there other Sierra part numbers associated with the same engines as the 18-7700?\u003c\/strong\u003e Yes, the engine applications that use the 18-7700 also reference other Sierra part numbers such as 18-7697, 18-7701, and 18-7684 for different components on the same engine.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988385935579,"sku":"SIE-18-7700","price":98.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-7700__24920.1722484691.500.750.jpg?v=1785329187"},{"product_id":"sierra-18-7677-knock-sensor-for-mercruiser-gm-v-8-305-350-377-cid-replaces-oem-r020027","title":"Sierra 18-7677 Knock Sensor, Replaces R020027, Fits MerCruiser MCM\/MIE GM V-8 305, 350 and 377 CID Engines","description":"\u003cp\u003eThe Sierra 18-7677 Knock Sensor is a detonation sensor built to meet the demands of high horsepower marine engines operating in the harsh marine environment. It is engineered to meet or exceed the original equipment part it replaces, giving boat owners a reliable option for restoring accurate detonation detection on applicable GM-based inboard and sterndrive engines. Sierra supplies OEM engine manufacturers and boat builders with quality parts, and this knock sensor is built to that same standard.\u003c\/p\u003e\u003cp\u003eThis sensor is designed for MerCruiser MCM\/MIE applications using GM V-8 305, 350 and 377 CID engines. It mounts via a flange mount configuration and uses a glass sensor body with an analog output type. The compact housing measures 0.39 x 0.39 x 0.39 inches, making it a direct functional replacement for the original detonation sensor on these engine platforms. Every Sierra part is backed by Sierra's customer satisfaction warranty.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7677\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Knock Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Glass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Flange Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Analog\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.22 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282287405\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser MCM\/MIE GM V-8 305, 350 and 377 CID engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eR020027\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-7677 knock sensor fit?\u003c\/strong\u003e The Sierra 18-7677 knock sensor is designed for MerCruiser MCM\/MIE applications using GM V-8 305, 350 and 377 CID engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-7677 replace?\u003c\/strong\u003e It replaces OEM number R020027, so any application originally fitted with R020027 can use the Sierra 18-7677 as a direct replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-7677 knock sensor made of?\u003c\/strong\u003e The sensor body is made of glass, housed in a compact flange-mount design measuring 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-7677 knock sensor weigh?\u003c\/strong\u003e This knock sensor weighs 0.22 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the knock sensor mount to the engine?\u003c\/strong\u003e The 18-7677 uses a flange mount configuration for installation on compatible GM V-8 marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of output does the 18-7677 knock sensor produce?\u003c\/strong\u003e This sensor produces an analog output signal, matching the original equipment detonation sensor it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-7677 a genuine OEM part or aftermarket?\u003c\/strong\u003e It is a Sierra-manufactured part engineered to meet or exceed the specifications of the original equipment sensor (R020027) it replaces, sold as a quality aftermarket replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering the 18-7677?\u003c\/strong\u003e The order includes one Sierra 18-7677 Knock Sensor, ready to install in place of the original R020027 sensor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7677 knock sensor come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-7677 knock sensor is covered under Sierra's customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-7677 knock sensor work on any GM V-8 marine engine?\u003c\/strong\u003e It is intended for MerCruiser MCM\/MIE GM V-8 engines in the 305, 350 and 377 CID range specifically, rather than being a universal fit across all GM V-8 marine engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988386427099,"sku":"SIE-18-7677","price":91.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-7677__27474.1558186420.500.750.jpg?v=1785188301"},{"product_id":"throttle-position-sensor-for-mercruiser-350-mag-replaces-oem-803148-sierra-18-7757","title":"Sierra 18-7757 Throttle Position Sensor, Flange Mount, for Mercury Racing 350\/377 V-8 Marine Engines","description":"\u003cp\u003eThe Sierra 18-7757 is a flange-mount throttle position sensor built for Mercury Racing 350 and 377 V-8 marine engines. It reads throttle plate position and sends a push-pull output signal to the engine control system, allowing the engine management to respond accurately to throttle input. The sensor uses a compact housing measuring 0.39 x 0.39 x 0.39 inches, making it a direct fit into the factory sensor location on applicable engine blocks.\u003c\/p\u003e\u003cp\u003eBuilt to the Sierra standard for marine replacement electrical components, the 18-7757 is intended as a straightforward swap for a worn, drifting, or failed throttle position sensor. A sensor that has gone out of calibration or failed outright can cause rough idle, hesitation, stalling, or inconsistent throttle response, and replacing it with a properly matched part restores accurate throttle-to-engine communication. This sensor is application-specific, so confirming the engine model and serial number range against the fitment list below is important before ordering.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7757\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Throttle Position Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Flange Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Push-Pull\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282294816\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBlack Scorpion SKI, 350 V-8, 1998-2002, serial range L005601 - M391599\u003c\/li\u003e\n\u003cli\u003eBlack Scorpion SKI, 350 V-8, 2003-2010, serial range M391600 - W698432\u003c\/li\u003e\n\u003cli\u003eScorpion 350 5.0L, 350 V-8, 2008-2010, serial range W698433 \u0026amp; UP\u003c\/li\u003e\n\u003cli\u003e377 Scorpion MCM, 377 V-8, 1999-2005, serial range L416146 - M907201\u003c\/li\u003e\n\u003cli\u003eMX 6.2L MPI, 377 V-8, 2000-2001, serial range L680003 - M299999\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-7757 throttle position sensor fit?\u003c\/strong\u003e The 18-7757 fits Black Scorpion SKI 350 V-8 engines (1998-2002 and 2003-2010), Scorpion 350 5.0L 350 V-8 engines (2008-2010), 377 Scorpion MCM 377 V-8 engines (1999-2005), and MX 6.2L MPI 377 V-8 engines (2000-2001).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this sensor?\u003c\/strong\u003e The Sierra 18-7757 measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-7757 sensor weigh?\u003c\/strong\u003e It weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-7757 mounted?\u003c\/strong\u003e This sensor uses a flange mount, which bolts directly to the engine's throttle body location.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat kind of output signal does this sensor produce?\u003c\/strong\u003e The Sierra 18-7757 uses a push-pull output type to communicate throttle position to the engine control system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-7757 a genuine Sierra part?\u003c\/strong\u003e Yes, this is Sierra part number 18-7757, a marine throttle position sensor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e One Sierra 18-7757 throttle position sensor is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7757 fit a 2008-2010 377 Mag engine?\u003c\/strong\u003e No. The 377 Mag engine for 2008-2010 uses a different sensor number; the 18-7757 covers the Black Scorpion SKI, Scorpion 350 5.0L, 377 Scorpion MCM, and MX 6.2L MPI applications listed for this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat serial number range applies to the Black Scorpion SKI application?\u003c\/strong\u003e For 1998-2002 model years the range is L005601 - M391599, and for 2003-2010 model years the range is M391600 - W698432.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7757 fit the MX 6.2L MPI DTS engine?\u003c\/strong\u003e No, the MX 6.2L MPI DTS application does not use the 18-7757 sensor; the 18-7757 is specified for the standard MX 6.2L MPI engine for 2000-2001.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC identifies the Sierra 18-7757?\u003c\/strong\u003e The UPC for this throttle position sensor is 808282294816.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat serial number range applies to the Scorpion 350 5.0L application?\u003c\/strong\u003e For the 2008-2010 Scorpion 350 5.0L, the 18-7757 applies from serial number W698433 and up.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988387147995,"sku":"SIE-18-7757","price":92.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-7757__31882.1722358886.500.750.jpg?v=1785188657"},{"product_id":"sierra-18-99365-rpm-rev-limiter-for-mercury-mariner-outboards","title":"Sierra Rev Limiter 18-99365 for Mercury Mariner Outboard Engines","description":"\u003cp\u003eThe Sierra 18-99365 is a rev limiter (RPM limiter) built for Mercury Mariner outboard engines. This component is part of the engine's ignition and speed-control circuit, protecting the powerhead from over-revving by limiting maximum engine RPM during operation. Rev limiters like this one are typically installed as a replacement for a worn or failed factory unit, restoring correct high-RPM cutoff behavior and helping prevent engine damage caused by prolonged over-speed operation.\u003c\/p\u003e\u003cp\u003eOrdering by the exact Sierra part number ensures the replacement matches the electrical characteristics and mounting configuration of the original Mercury Mariner rev limiter it is designed to replace. It is a straightforward swap for technicians and DIY boat owners performing ignition system maintenance or troubleshooting an over-rev condition on a Mercury Mariner outboard.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99365\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e RPM Limiter (Rev Limiter)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Mercury Mariner outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282398835\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Mariner outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99365?\u003c\/strong\u003e The Sierra 18-99365 is a rev limiter (RPM limiter) designed for Mercury Mariner outboard engines, used to cap maximum engine RPM as part of the ignition system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a rev limiter do on an outboard engine?\u003c\/strong\u003e A rev limiter restricts an engine from exceeding a set maximum RPM, which helps protect the powerhead from damage caused by over-revving. The Sierra 18-99365 performs this function on compatible Mercury Mariner outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines does the Sierra 18-99365 fit?\u003c\/strong\u003e The Sierra 18-99365 is designed for Mercury Mariner outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99365 weigh?\u003c\/strong\u003e The Sierra 18-99365 rev limiter weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99365 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99365 is the Sierra manufacturer part number for this rev limiter, not a third-party clone.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-99365 rev limiter something I can do myself?\u003c\/strong\u003e Installing the Sierra 18-99365 involves connecting it into the outboard's existing ignition wiring in place of the original rev limiter, a task suited to owners comfortable with basic outboard electrical work or a qualified marine technician.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace my outboard's rev limiter?\u003c\/strong\u003e A failed or malfunctioning rev limiter can allow an engine to over-rev or can cause erratic running, so replacing it with the Sierra 18-99365 restores correct RPM-limiting function on compatible Mercury Mariner outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-99365?\u003c\/strong\u003e Ordering the Sierra 18-99365 includes the rev limiter unit itself, identified by UPC 808282398835.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the part number 18-99365 refer to a single specific part?\u003c\/strong\u003e Yes, 18-99365 is the Sierra manufacturer part number that identifies this specific rev limiter for Mercury Mariner outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99365 used on inboard or sterndrive engines?\u003c\/strong\u003e No, the Sierra 18-99365 is designed for Mercury Mariner outboard engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442034395,"sku":"SIE-18-99365","price":175.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/41DCjgS417L.jpg?v=1784412169"},{"product_id":"internal-engine-wiring-harness-for-1985-johnson-evinrude-120-140-hp-outboards-replaces-omc-0393590-sierra-18-99389","title":"Sierra Wiring Harness 18-99389, OMC 0393590 Cross Reference, Fits 1985 Evinrude Johnson 120\/140 HP Outboards","description":"\u003cp\u003eThe Sierra 18-99389 is an internal engine wiring harness (cable assembly) built to connect the electrical components of the powerhead on covered Evinrude, Johnson, and OMC outboards. It is constructed with copper wiring for reliable current flow and electrical continuity between the engine's ignition and electrical components. Wiring harnesses like this one are a common replacement item on older outboards, since insulation and connector points degrade with heat cycling, vibration, and years of exposure to a marine engine compartment. Installing a fresh harness restores a clean, factory-style wiring path and helps eliminate intermittent electrical faults caused by a deteriorated original harness.\u003c\/p\u003e\u003cp\u003eThis harness is cross-referenced to the OMC part number 0393590 and is intended to fit 1985 Evinrude, Johnson, and OMC outboards rated at 120 and 140 HP. Always confirm your engine's horsepower rating and model year against the fitment listed below before ordering, since wiring harnesses are engine-specific and the wrong harness will not connect correctly.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99389\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282398880\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 0393590\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Evinrude, Johnson, and OMC 120 and 140 HP outboards (1985)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEvinrude 120 HP outboard, 1985\u003c\/li\u003e\n\u003cli\u003eEvinrude 140 HP outboard, 1985\u003c\/li\u003e\n\u003cli\u003eJohnson 120 HP outboard, 1985\u003c\/li\u003e\n\u003cli\u003eJohnson 140 HP outboard, 1985\u003c\/li\u003e\n\u003cli\u003eOMC 120 HP outboard, 1985\u003c\/li\u003e\n\u003cli\u003eOMC 140 HP outboard, 1985\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e0393590\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99389 wiring harness fit?\u003c\/strong\u003e The Sierra 18-99389 is designed for 1985 Evinrude, Johnson, and OMC outboards rated at 120 and 140 HP.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99389 the same as OMC part number 0393590?\u003c\/strong\u003e Yes, the Sierra 18-99389 wiring harness cross-references directly to OMC part number 0393590.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the wiring harness made from?\u003c\/strong\u003e The internal wires in the Sierra 18-99389 harness are copper, chosen for reliable electrical conductivity in an engine compartment environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99389 wiring harness weigh?\u003c\/strong\u003e It weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness fit a 1985 Johnson 140 HP outboard?\u003c\/strong\u003e Yes, the Sierra 18-99389 is listed to fit 1985 Johnson outboards in the 120 and 140 HP range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this harness work on OMC-branded outboards, not just Evinrude or Johnson?\u003c\/strong\u003e Yes, the fitment for the Sierra 18-99389 covers Evinrude, Johnson, and OMC 1985 outboards at 120 and 140 HP, since these brands shared engine platforms during that era.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the internal wiring harness on my outboard?\u003c\/strong\u003e An internal wiring harness like the Sierra 18-99389 connects key electrical components on the powerhead, and it is commonly replaced when the original harness has degraded from age, heat, or vibration, causing intermittent electrical issues.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-99389 harness?\u003c\/strong\u003e The order is for the Sierra 18-99389 internal wiring harness (cable assembly) itself, sized for 1985 Evinrude, Johnson, and OMC 120\/140 HP outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UPC for the Sierra 18-99389 harness listed anywhere?\u003c\/strong\u003e Yes, the Sierra 18-99389 wiring harness carries UPC 808282398880.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 0393590 cross-reference number to confirm compatibility with my engine's original harness?\u003c\/strong\u003e Yes, if your engine's original harness is OMC 0393590, the Sierra 18-99389 is the cross-referenced replacement for it.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442329307,"sku":"SIE-18-99389","price":203.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-3590_lg__22465.1722503305.500.750.jpg?v=1785188030"},{"product_id":"mercury-mariner-3-cyl-trigger-assembly-replaces-99021a15-fits-1987-1999-45-jet-90-hp-outboards-sierra-18-99393","title":"Sierra 18-99393 Ignition Trigger for Mercury\/Mariner 3-Cylinder Outboards, 1987-1999, 45-90 HP, Replaces 99021A15","description":"\u003cp\u003eThe Sierra 18-99393 Ignition Trigger is a direct replacement trigger component for Mercury and Mariner 3-cylinder outboard engines built from 1987 to 1999. The trigger is a key part of the ignition system, working with the stator and switch box to generate the timing signal that fires the spark at the correct point in the engine cycle. A worn or failed trigger commonly causes hard starting, misfiring, poor idle, or a no-spark condition, making this a frequent replacement item for outboard owners maintaining or troubleshooting their ignition system.\u003c\/p\u003e\u003cp\u003eThis trigger is designed for Mercury\/Mariner 3-cylinder powerheads covering the 45 JET, 50, 60, 65, 70, 75, 80, and 90 HP range within the stated model years. It measures 7.1 x 6.3 x 1.9 inches and has a black finish. Because it cross-references to several original Mercury\/Mariner part numbers, it can be used to replace any of those numbers on qualifying 3-cylinder powerheads, giving owners and technicians a straightforward way to confirm fitment when servicing the ignition system.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99393\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Stators \u0026amp; Triggers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 7.1 x 6.3 x 1.9 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394264\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 99021A15, 99021A16, 99021A13, 99021A8, 99021A3, 99021A5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercury\/Mariner 3-cylinder outboards, 1987-1999, 45 JET, 50, 60, 65, 70, 75, 80, 90 HP\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mariner 3-cylinder outboards, 1987-1999\u003c\/li\u003e\n\u003cli\u003e45 JET, 50, 60, 65, 70, 75, 80, and 90 HP\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e99021A15\u003c\/li\u003e\n\u003cli\u003e99021A16\u003c\/li\u003e\n\u003cli\u003e99021A13\u003c\/li\u003e\n\u003cli\u003e99021A8\u003c\/li\u003e\n\u003cli\u003e99021A3\u003c\/li\u003e\n\u003cli\u003e99021A5\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99393 trigger fit?\u003c\/strong\u003e It fits Mercury\/Mariner 3-cylinder outboards built from 1987 to 1999, covering the 45 JET, 50, 60, 65, 70, 75, 80, and 90 HP models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this trigger replace?\u003c\/strong\u003e The Sierra 18-99393 cross-references to OEM numbers 99021A15, 99021A16, 99021A13, 99021A8, 99021A3, and 99021A5, so it can be used in place of any of those on a qualifying 3-cylinder powerhead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-99393 trigger?\u003c\/strong\u003e The trigger has a black finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this trigger?\u003c\/strong\u003e The Sierra 18-99393 measures 7.1 x 6.3 x 1.9 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99393 trigger weigh?\u003c\/strong\u003e It weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate a failing ignition trigger?\u003c\/strong\u003e Hard starting, misfiring, a rough or unstable idle, and a no-spark condition are common symptoms of a failing trigger on Mercury\/Mariner 3-cylinder outboards, and the Sierra 18-99393 is a direct replacement for these issues.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this trigger fit 2-cylinder or 4-cylinder Mercury outboards?\u003c\/strong\u003e No, the Sierra 18-99393 is designed specifically for Mercury\/Mariner 3-cylinder outboard engines within the 1987-1999 range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99393 trigger compatible with the 45 JET model?\u003c\/strong\u003e Yes, the 45 JET is one of the engines covered by the Sierra 18-99393, along with the 50, 60, 65, 70, 75, 80, and 90 HP 3-cylinder models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does an ignition trigger do in an outboard motor?\u003c\/strong\u003e The trigger works with the stator and switch box to generate the timing signal that tells the ignition system when to fire the spark, and the Sierra 18-99393 provides this function for Mercury\/Mariner 3-cylinder outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99393 trigger?\u003c\/strong\u003e The UPC for the Sierra 18-99393 Mercury\/Mariner 3-cylinder trigger is 808282394264.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this trigger to replace multiple different Mercury part numbers?\u003c\/strong\u003e Yes, because the Sierra 18-99393 cross-references six different OEM numbers (99021A15, 99021A16, 99021A13, 99021A8, 99021A3, 99021A5), it works as a replacement for any engine originally equipped with one of those parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat year range of Mercury\/Mariner outboards does this trigger cover?\u003c\/strong\u003e The Sierra 18-99393 covers Mercury\/Mariner 3-cylinder outboards built between 1987 and 1999.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442394843,"sku":"SIE-18-99393","price":134.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-134-9021-3_lg__72757.1558114046.500.750.jpg?v=1785188399"},{"product_id":"sierra-18-99392-marine-wiring-harness-for-mercury-mariner-outboards-20-150-hp-2-4-6-cylinder-1966-1981","title":"Sierra 18-99392 Mercury\/Mariner Outboard Wiring Harness, 2\/4\/6 Cylinder Engines 1966-1981","description":"\u003cp\u003eThe Sierra 18-99392 is a wiring harness built to connect Mercury and Mariner outboard engines to the boat's control and instrument wiring. It carries copper conductors terminated with a Mercury\/Mariner engine wiring connector, giving a direct plug-in fit at the engine end so the harness routes power and signal wiring between the outboard and the helm without splicing into factory connectors. This harness is sized for a range of Mercury\/Mariner outboards spanning 2, 4, and 6 cylinder configurations built between 1966 and 1981, covering horsepower ratings from 20 HP up through 150 HP depending on cylinder count and model year. Copper wiring resists corrosion better than lower-grade conductors and is a standard choice for marine electrical applications exposed to moisture and vibration. Because outboard wiring connectors and pin configurations vary by model year and horsepower, buyers should confirm the harness connector matches their engine's original wiring connector before ordering, or check the manufacturer's recommended part number for their specific application. This harness is intended as a replacement or repair harness where the factory wiring has degraded, corroded, or been damaged, restoring a clean connection between the outboard and the boat's electrical system.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99392\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Mercury\/Mariner Engine Wiring Connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 7 x 9 x 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engines:\u003c\/strong\u003e 20 and 40 HP (2 cylinder), 50, 65, 80 and 85 HP (4 cylinder), 90, 95, 100, 115, 125, 135, 140 and 150 HP (6 cylinder)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Years:\u003c\/strong\u003e 1966-1981\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394257\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mariner 20 and 40 HP, 2 cylinder outboards, 1970-1981\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 50, 65, 80 and 85 HP, 4 cylinder outboards, 1967-1975\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 90, 95, 100, 115, 125, 135, 140 and 150 HP, 6 cylinder outboards, 1966-1979\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99392 wiring harness fit?\u003c\/strong\u003e The Sierra 18-99392 fits Mercury\/Mariner 2, 4, and 6 cylinder outboards, covering 20 and 40 HP (2 cylinder) models from 1970-1981, 50, 65, 80 and 85 HP (4 cylinder) models from 1967-1975, and 90, 95, 100, 115, 125, 135, 140 and 150 HP (6 cylinder) models from 1966-1979.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this harness made with copper wiring?\u003c\/strong\u003e Yes, the Sierra 18-99392 wiring harness uses copper conductors, which hold up well against the corrosion and vibration common in marine electrical systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-99392 harness?\u003c\/strong\u003e The Sierra 18-99392 measures 7 x 9 x 2.5 inches as packaged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99392 wiring harness weigh?\u003c\/strong\u003e It weighs 1.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99392 harness use the original Mercury connector?\u003c\/strong\u003e Yes, the Sierra 18-99392 terminates in a Mercury\/Mariner engine wiring connector designed to plug into the factory connection point on compatible outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness work on any Mercury outboard?\u003c\/strong\u003e No, the Sierra 18-99392 is designed for specific Mercury\/Mariner horsepower and cylinder configurations built between 1966 and 1981, so buyers should confirm their engine's horsepower, cylinder count, and model year fall within the listed ranges before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace my outboard's wiring harness?\u003c\/strong\u003e A wiring harness like the Sierra 18-99392 is typically replaced when the original harness has corroded, frayed, or been damaged, causing intermittent electrical connections or engine control issues.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99392 a direct plug-in replacement?\u003c\/strong\u003e Yes, its Mercury\/Mariner engine wiring connector is built to connect at the same point as the factory harness on compatible engines, so no splicing into the original wiring is required at the connector.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-99392 harness?\u003c\/strong\u003e The Sierra 18-99392 order includes the complete wiring harness with its Mercury\/Mariner engine wiring connector attached.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this harness on a 6 cylinder Mercury outboard?\u003c\/strong\u003e Yes, the Sierra 18-99392 covers 6 cylinder Mercury\/Mariner outboards rated 90, 95, 100, 115, 125, 135, 140 and 150 HP from 1966-1979.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes horsepower affect which harness connector I need?\u003c\/strong\u003e Yes, connector configuration on Mercury\/Mariner outboards varies by horsepower and model year, so it is important to check the manufacturer's recommended part number for your specific engine before installing the 18-99392.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442656987,"sku":"SIE-18-99392","price":225.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-414-2770_lg__61837.1722478587.500.750.jpg?v=1785189072"},{"product_id":"sierra-18-99401-engine-adapter-harness-for-johnson-evinrude-outboards-1976-1995-adapts-to-deutsch-dt-controls","title":"Sierra Johnson\/Evinrude Engine Adapter Harness 18-99401, Adapts 1976-1995 Engines to Deutsch Controls","description":"\u003cp\u003eThe Sierra 18-99401 Engine Adapter Harness lets owners of older Johnson and Evinrude outboards connect to newer Deutsch-style control wiring without replacing the engine's original harness. It is built as a universal-fit adapter, bridging the older engine-side connector to the modern Deutsch connector used on updated control systems, so the two generations of wiring can be joined directly instead of splicing wires by hand.\u003c\/p\u003e\u003cp\u003eThe harness measures 18 inches in length, giving enough reach to route between the engine wiring and the control-side connection point during an install. On the control end it terminates in a DT Connector, matching the Deutsch connector style found on newer outboard control harnesses. It is supplied as a single adapter harness, ready to connect between the two systems once the correct connector orientation is confirmed for the specific engine.\u003c\/p\u003e\u003cp\u003eThis adapter is intended for 1976-1995 Johnson and Evinrude engines that need to interface with new Deutsch-style controls. Because fitment depends on the exact engine and control system being paired, buyers should confirm the connector configuration matches their engine before installing.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99401\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Engine Adapter Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Johnson and Evinrude engines, 1976-1995\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdapts To:\u003c\/strong\u003e New Deutsch-style engine controls\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal Fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e DT Connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Length:\u003c\/strong\u003e 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson outboard engines, 1976-1995\u003c\/li\u003e\n\u003cli\u003eEvinrude outboard engines, 1976-1995\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99401 adapter harness fit?\u003c\/strong\u003e It is built for Johnson and Evinrude outboard engines from 1976-1995 that need to connect to newer Deutsch-style control wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this harness actually do?\u003c\/strong\u003e The 18-99401 adapts the older engine-side wiring connector on 1976-1995 Johnson and Evinrude outboards to a new Deutsch-style connector, so the older engine can be wired into updated controls without re-splicing the factory harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the Sierra 18-99401 harness?\u003c\/strong\u003e It measures 18 inches in length, end to end.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of connector is on the control end?\u003c\/strong\u003e The control-side end of the 18-99401 terminates in a DT Connector, matching the Deutsch connector style used on newer outboard control harnesses.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a universal-fit part?\u003c\/strong\u003e Yes, the 18-99401 is described as a universal-fit adapter for 1976-1995 Johnson and Evinrude engines, but buyers should verify the connector configuration matches their specific engine before installing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99401 weigh?\u003c\/strong\u003e The Sierra 18-99401 adapter harness weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many pieces come with this part?\u003c\/strong\u003e The 18-99401 is supplied as a single adapter harness (one item).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this to upgrade an older Johnson or Evinrude to modern controls without rewiring the whole boat?\u003c\/strong\u003e That is its purpose: the 18-99401 lets a 1976-1995 Johnson or Evinrude engine plug into new Deutsch-style control wiring through the adapter harness instead of requiring the control harness to be rewired to the old connector style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99401 include the Deutsch connector on both ends?\u003c\/strong\u003e It has a DT Connector on the control side to mate with new Deutsch-style controls, with the opposite end configured for the 1976-1995 Johnson\/Evinrude engine-side connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra part number 18-99401 the correct number to order?\u003c\/strong\u003e Yes, 18-99401 is the part number for this Johnson\/Evinrude engine adapter harness.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442755291,"sku":"SIE-18-99401","price":158.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-423-6344_lg__62772.1558111494.500.750.jpg?v=1785188158"},{"product_id":"sierra-18-99408-trigger-for-mercury-mariner-4-cyl-outboards-1988-1997-replaces-99021a2-fits-80-jet-100-115-125-hp","title":"Sierra Trigger 18-99408 for Mercury\/Mariner 4 Cylinder Outboards 1988-1997, Replaces 99021A2, 99021A6, 99021K2","description":"\u003cp\u003eThe Sierra Trigger 18-99408 is an ignition trigger built to restore reliable spark timing on Mercury and Mariner 4 cylinder outboard engines. The trigger is a core ignition component that signals the engine's control module to fire the spark at the correct point in the crankshaft rotation, and a worn or failing trigger commonly causes hard starting, misfiring, rough idle, or a no-spark condition. Replacing the trigger with the Sierra 18-99408 restores the factory ignition signal path without needing to source a used or salvage part.\u003c\/p\u003e\u003cp\u003eThis trigger is designed to fit Mercury\/Mariner 4 cylinder engines built between 1988 and 1997, covering the 80 JET, 100, 115, and 125 HP models. It is a direct cross to the OEM Mercury numbers 99021A2, 99021A6, and 99021K2, so it installs in place of the original trigger using the factory mounting points and wiring connections.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ignition Trigger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Mercury\/Mariner 4 Cylinder Outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorsepower Coverage:\u003c\/strong\u003e 80 JET, 100, 115, 125 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Years:\u003c\/strong\u003e 1988-1997\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394394\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mariner 4 cylinder outboards, 1988-1997\u003c\/li\u003e\n\u003cli\u003e80 JET, 100, 115 and 125 HP\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e99021A2\u003c\/li\u003e\n\u003cli\u003e99021A6\u003c\/li\u003e\n\u003cli\u003e99021K2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99408 trigger fit?\u003c\/strong\u003e The Sierra 18-99408 fits Mercury\/Mariner 4 cylinder outboard engines built from 1988 to 1997, specifically the 80 JET, 100, 115, and 125 HP models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM Mercury part numbers does this trigger replace?\u003c\/strong\u003e The Sierra 18-99408 replaces Mercury OEM numbers 99021A2, 99021A6, and 99021K2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99408 trigger weigh?\u003c\/strong\u003e It weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this trigger fit a 6 cylinder Mercury outboard?\u003c\/strong\u003e No, the Sierra 18-99408 is designed specifically for Mercury\/Mariner 4 cylinder outboards, not 6 cylinder models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate the trigger needs to be replaced?\u003c\/strong\u003e Hard starting, misfiring, a rough idle, or a complete loss of spark on a Mercury\/Mariner 4 cylinder outboard can indicate the trigger, such as the Sierra 18-99408, has failed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99408 a genuine Mercury part or aftermarket?\u003c\/strong\u003e The 18-99408 is an aftermarket trigger manufactured by Sierra, built to replace the OEM Mercury 99021A2, 99021A6, and 99021K2 triggers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 125 HP Mercury outboard use this trigger?\u003c\/strong\u003e Yes, the 125 HP Mercury\/Mariner 4 cylinder outboard (1988-1997) is covered by the Sierra 18-99408 trigger.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat years of Mercury\/Mariner outboards use the 18-99408 trigger?\u003c\/strong\u003e Model years 1988 through 1997 for the applicable 4 cylinder Mercury\/Mariner outboards use this trigger.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 80 JET model use the same trigger as the 100 HP model?\u003c\/strong\u003e Yes, the Sierra 18-99408 covers both the 80 JET and the 100 HP Mercury\/Mariner 4 cylinder outboards, along with the 115 and 125 HP models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99408 trigger?\u003c\/strong\u003e The UPC for the Sierra 18-99408 Mercury\/Mariner trigger is 808282394394.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442853595,"sku":"SIE-18-99408","price":123.28,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-134-9021-4_lg__23559.1748371108.500.750.jpg?v=1785188669"},{"product_id":"mercury-mariner-4-cylinder-ignition-trigger-sierra-18-99403-replaces-77000a1-fits-75-80-hp-outboards-1980-1986","title":"Sierra 18-99403 Trigger for Mercury Mariner 4 Cyl Outboards - Replaces 77000A1, 965451, 96453A1, 96453A2","description":"\u003cp\u003eThe Sierra 18-99403 Trigger is an ignition timing trigger built for Mercury and Mariner 4 cylinder outboard engines. The trigger is a core component of the ignition system, working with the stator and switch box to signal precise spark timing to each cylinder as the flywheel rotates. When a trigger wears out or its output weakens, engines commonly develop hard starting, misfires, rough idle, or a no-spark condition, so replacing the trigger with a correctly fitted unit restores reliable ignition timing.\u003c\/p\u003e\u003cp\u003eThis trigger fits Mercury\/Mariner 75 HP outboards built 1984-1986 and Mercury\/Mariner 80 HP Hooked Arm outboards built 1980-1983. It is a direct cross for several Mercury\/Mariner OEM trigger part numbers, letting owners of these engines source a replacement without hunting for an obsolete factory number. As a 4 cylinder application trigger, it is sized and wired to match the timing requirements of these specific powerheads.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99403\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Outboard Ignition Trigger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury\/Mariner 4 Cyl outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e 1984-1986 75 HP; 1980-1983 80 HP Hooked Arm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394349\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mariner 75 HP, 1984-1986\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 80 HP Hooked Arm, 1980-1983\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e77000A1\u003c\/li\u003e\n\u003cli\u003e965451\u003c\/li\u003e\n\u003cli\u003e96453A1\u003c\/li\u003e\n\u003cli\u003e96453A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99403 trigger fit?\u003c\/strong\u003e The Sierra 18-99403 trigger fits Mercury\/Mariner 75 HP outboards from 1984-1986 and Mercury\/Mariner 80 HP Hooked Arm outboards from 1980-1983.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does this trigger replace?\u003c\/strong\u003e Sierra 18-99403 replaces Mercury\/Mariner OEM trigger numbers 77000A1, 965451, 96453A1, and 96453A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99403 trigger only for 4 cylinder Mercury outboards?\u003c\/strong\u003e Yes, this trigger is built for Mercury\/Mariner 4 cylinder outboard engines, specifically the 75 HP and 80 HP Hooked Arm models covered by its fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99403 trigger weigh?\u003c\/strong\u003e It weighs 0.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate a trigger needs replacement?\u003c\/strong\u003e A failing trigger on a Mercury\/Mariner outboard typically causes hard starting, engine misfires, a rough idle, or a complete loss of spark, since the trigger sends the timing signal that fires each cylinder.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the trigger work with the stock ignition system or does it require other parts?\u003c\/strong\u003e The 18-99403 trigger is designed to work within the engine's existing ignition system alongside the stator and switch box; it is a direct replacement for the OEM trigger and does not require converting to a different ignition setup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-99403 fit an 80 HP Mercury that is not a Hooked Arm model?\u003c\/strong\u003e The listed fitment for the 80 HP application is specifically the 1980-1983 Hooked Arm model; other 80 HP variants are not covered by this fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket equivalent?\u003c\/strong\u003e This is a Sierra-branded trigger, part number 18-99403, manufactured as a replacement for the listed Mercury\/Mariner OEM trigger numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use part number 96453A2 to cross-reference this trigger?\u003c\/strong\u003e Yes, 96453A2 is one of the OEM numbers that the Sierra 18-99403 trigger replaces, along with 77000A1, 965451, and 96453A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat years of the Mercury 75 HP outboard use this trigger?\u003c\/strong\u003e The 1984-1986 Mercury\/Mariner 75 HP outboard uses the Sierra 18-99403 trigger.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442886363,"sku":"SIE-18-99403","price":161.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-134-6454_lg__62041.1558113206.500.750.jpg?v=1785188177"},{"product_id":"mercury-mariner-boat-side-outboard-wiring-harness-1968-1981-replaces-84-822253a20-sierra-18-99400","title":"Sierra 18-99400 Mercury Mariner Wiring Harness, Replaces 84-822253A20, Fits 1968-1981 Engines","description":"\u003cp\u003eThe Sierra 18-99400 is a boatside wiring harness built for Mercury and Mariner outboard engines, designed to carry the electrical connections between the boat's control side and the outboard powerhead. It is constructed with copper wiring for reliable conductivity and a durable connection under the vibration and moisture exposure typical of marine engine compartments. The harness exits through the side of the lower cowling, matching the routing of the original equipment harness it replaces.\u003c\/p\u003e\u003cp\u003eThis harness fits 1968-1981 Mercury and Mariner engines that use the 414-2770, 414-3369, and 414-5532 OEM harnesses, and is a direct equivalent for several factory Mercury\/Mariner part numbers. It uses a 3.5mm jack connector and measures 11 x 8.5 x 4.5 inches as packaged, weighing 4.2 pounds. Boat owners and marine technicians use this harness to replace a cracked, corroded, or failing original wiring harness without having to source discontinued factory parts.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99400\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394332\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 11 x 8.5 x 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e 3.5mm Jack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Exit:\u003c\/strong\u003e Side of lower cowling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury\/Mariner engines, 1968-1981, using the 414-2770, 414-3369, or 414-5532 OEM harnesses\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e84-822253A20\u003c\/li\u003e\n\u003cli\u003e84-822253T20\u003c\/li\u003e\n\u003cli\u003e45876A10\u003c\/li\u003e\n\u003cli\u003e45876A15\u003c\/li\u003e\n\u003cli\u003e45876A20\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99400 wiring harness fit?\u003c\/strong\u003e The 18-99400 fits Mercury and Mariner engines from 1968-1981 that use the 414-2770, 414-3369, or 414-5532 OEM harnesses.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99400 a direct replacement for the factory Mercury harness?\u003c\/strong\u003e Yes, it replaces OEM Mercury\/Mariner part numbers 84-822253A20, 84-822253T20, 45876A10, 45876A15, and 45876A20.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-99400 harness made of?\u003c\/strong\u003e This Sierra wiring harness uses copper wiring for reliable electrical conductivity in the marine engine environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99400 wiring harness weigh?\u003c\/strong\u003e The Sierra 18-99400 weighs 4.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-99400 harness?\u003c\/strong\u003e As packaged, the 18-99400 measures 11 x 8.5 x 4.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere does the wiring harness exit the engine cowling?\u003c\/strong\u003e The 18-99400 harness exits through the side of the lower cowling, matching the original equipment routing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of connector does the 18-99400 use?\u003c\/strong\u003e It is equipped with a 3.5mm jack connector.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99400 fit any Mercury outboard regardless of year?\u003c\/strong\u003e No, the 18-99400 is designed for Mercury\/Mariner engines built between 1968 and 1981 that use the 414-2770, 414-3369, or 414-5532 OEM harnesses; check your engine's original harness number before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace my boat's wiring harness?\u003c\/strong\u003e A wiring harness like the 18-99400 is typically replaced when the original becomes cracked, corroded, or develops intermittent electrical connections from age and marine exposure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this harness sold as a complete boatside unit?\u003c\/strong\u003e Yes, the Sierra 18-99400 is supplied as a complete boatside wiring harness ready to connect between the boat controls and the outboard.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442919131,"sku":"SIE-18-99400","price":320.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-474-9550_lg__79635.1558112951.500.750.jpg?v=1785188176"},{"product_id":"johnson-evinrude-adapter-harness-for-1996-2016-engines-to-1976-1995-controls-sierra-18-99402-cdi-423-6349-18-in-marine-wiring-adapter","title":"Sierra Johnson\/Evinrude Engine Wiring Adapter Harness 18-99402, Adapts 1996-2016 Engines to 1976-1995 Controls","description":"\u003cp\u003eThe Sierra 18-99402 is a wiring adapter harness built to bridge the electrical connection between newer Johnson and Evinrude outboard engines and older control systems. It allows an owner running a 1996-2016 Johnson or Evinrude engine to connect that engine to controls built for the 1976-1995 era, avoiding a full rewire or control-box replacement when upgrading or swapping a powerhead. The harness is designed for use in a marine environment, with connectors and wiring sized to handle the vibration, moisture, and temperature swings typical of an outboard engine compartment.\u003c\/p\u003e\u003cp\u003eAt 18 inches long, the harness is sized to route between the engine's wiring loom and the boat's existing control harness without excess slack. Because engine and control wiring configurations vary by model and production year, Sierra recommends checking the specific part numbers recommended for your engine and control setup before ordering to confirm a proper fit. This adapter is a Sierra 18-99402, part of Sierra's line of Evinrude outboard electrical system components.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99402\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Length:\u003c\/strong\u003e 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engines:\u003c\/strong\u003e 1996-2016 Johnson and Evinrude outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdapts To Controls:\u003c\/strong\u003e 1976-1995 Johnson\/Evinrude control systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394837\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude outboard engines, 1996-2016, adapting to 1976-1995 control systems\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99402 adapter harness do?\u003c\/strong\u003e It connects a 1996-2016 Johnson or Evinrude outboard engine's wiring to a control system built for the 1976-1995 era, so the two can communicate without rewiring the boat's controls.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the harness?\u003c\/strong\u003e The Sierra 18-99402 harness measures 18 inches, sized to route between the engine wiring loom and the boat's existing control harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99402 weigh?\u003c\/strong\u003e It weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness fit any Johnson or Evinrude engine?\u003c\/strong\u003e It is designed for 1996-2016 Johnson and Evinrude engines being adapted to 1976-1995 controls; Sierra recommends checking the part numbers recommended for your specific engine and control combination before ordering to confirm a proper fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this harness to connect an older control box to a newer outboard?\u003c\/strong\u003e Yes, that is the harness's purpose: adapting a newer (1996-2016) Johnson\/Evinrude engine so it can work with an older (1976-1995) control system, which is useful when a powerhead is upgraded but the boat's controls are kept.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99402 rated for marine environments?\u003c\/strong\u003e Yes, the harness is built for use in a marine environment, where it is exposed to moisture, vibration, and temperature changes typical of an outboard engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99402 include connectors on both ends?\u003c\/strong\u003e The harness is a complete adapter cable intended to plug in between the engine wiring and the boat's control wiring; check your engine and control part numbers against Sierra's fitment guidance to confirm connector compatibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this part?\u003c\/strong\u003e The UPC for the Sierra 18-99402 wiring adapter harness is 808282394837.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need any other parts to use this harness?\u003c\/strong\u003e No additional parts are specified; the 18-99402 is installed inline between the existing engine wiring and control wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this harness only for Johnson and Evinrude engines?\u003c\/strong\u003e Yes, the Sierra 18-99402 is built specifically to adapt Johnson and Evinrude engine wiring to Johnson\/Evinrude control systems.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442984667,"sku":"SIE-18-99402","price":158.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-423-6349_lg__81441.1558111549.500.750.jpg?v=1785188923"},{"product_id":"johnson-evinrude-ignition-trigger-sensor-timer-base-replaces-oem-583387-585072-584716-fits-1977-2005-4-60-hp-outboards-sierra-18-99398","title":"Sierra 18-99398 Johnson Evinrude Trigger Sensor, 2 Cylinder, Replaces 585072, 584716, 583387","description":"\u003cp\u003eThe Sierra 18-99398 is a trigger sensor for Johnson\/Evinrude 2 cylinder outboard engines, serving as a key component of the ignition system that signals the ignition module to fire the spark at the correct point in the engine cycle. Accurate triggering is essential for smooth idling, reliable starting, and consistent power delivery, and a worn or failing trigger sensor is a common cause of hard starting, misfiring, or intermittent ignition faults on these outboards. This unit is built as a direct equivalent to the original Johnson\/Evinrude trigger assembly, matching the mounting and electrical function of the OEM part it replaces. It is constructed with a metal housing for durability in the marine engine environment and is sized to fit within the compact footprint of the original component. The sensor is intended as a straightforward replacement for boat owners and marine technicians servicing older Johnson\/Evinrude 2 cylinder outboards covering the 4 to 60 HP range, restoring correct ignition timing without requiring modification of the surrounding wiring harness or ignition module. Because ignition timing components vary across engine years and cylinder counts, buyers should confirm their engine's cylinder configuration and horsepower rating against the fitment details below before ordering.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99398\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ignition Trigger Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Johnson\/Evinrude 2 cylinder outboards, 1977-2005, 4 to 60 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 1 inch D x 1 inch W x 1 inch H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394318\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude 2 cylinder outboards, 1977-2005, 4 to 60 HP\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e585072\u003c\/li\u003e\n\u003cli\u003e584716\u003c\/li\u003e\n\u003cli\u003e583387\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99398 trigger sensor do?\u003c\/strong\u003e The Sierra 18-99398 is an ignition trigger sensor that signals the ignition module on Johnson\/Evinrude 2 cylinder outboards to fire the spark at the correct point in the engine cycle, which is essential for reliable starting and smooth running.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99398 fit?\u003c\/strong\u003e This trigger sensor fits Johnson\/Evinrude 2 cylinder outboard engines in the 4 to 60 HP range, covering model years 1977-2005.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-99398 replace?\u003c\/strong\u003e It replaces Johnson\/Evinrude OEM part numbers 585072, 584716, and 583387.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99398 designed for 2 cylinder engines specifically?\u003c\/strong\u003e Yes, the Sierra 18-99398 is built for Johnson\/Evinrude 2 cylinder outboard applications; buyers should confirm their engine's cylinder count before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the trigger sensor made of?\u003c\/strong\u003e The Sierra 18-99398 trigger sensor has a metal housing, chosen for durability in the marine ignition system environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow big is the Sierra 18-99398?\u003c\/strong\u003e The unit measures 1 inch deep by 1 inch wide by 1 inch high, sized to fit within the original trigger sensor's mounting location.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99398 trigger sensor weigh?\u003c\/strong\u003e It weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99398 an OEM part or an aftermarket equivalent?\u003c\/strong\u003e It is a Sierra-branded aftermarket replacement engineered to match the fit and function of the original Johnson\/Evinrude trigger sensor it replaces (585072, 584716, 583387), not a part sourced from Johnson\/Evinrude.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the 18-99398 myself?\u003c\/strong\u003e The Sierra 18-99398 is designed as a direct replacement for the original Johnson\/Evinrude trigger sensor, so it installs in the same location and connects to the existing ignition wiring without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-99398?\u003c\/strong\u003e You receive one Sierra 18-99398 trigger sensor unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the 18-99398 compare to the original Johnson\/Evinrude trigger sensor?\u003c\/strong\u003e The 18-99398 is intended to function as a drop-in equivalent to OEM numbers 585072, 584716, and 583387, matching the mounting and electrical role of the original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99398 work on a 4 to 60 HP outboard from any model year?\u003c\/strong\u003e The Sierra 18-99398 is confirmed for Johnson\/Evinrude 2 cylinder outboards spanning the 1977-2005 model years within the 4 to 60 HP range; engines outside that span or cylinder count should be checked against the listed OEM cross-reference numbers first.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443017435,"sku":"SIE-18-99398","price":52.31,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-133-3387_lg__70183.1558111567.500.750.jpg?v=1785188349"},{"product_id":"ignition-trigger-for-mercury-mariner-4-cylinder-outboards-1976-1997-interchanges-134-6452-sierra-18-99390","title":"Sierra Trigger 18-99390 for 4 Cylinder Mercury\/Mariner Outboards (1976-1997), Replaces 134-6452","description":"\u003cp\u003eThe Sierra 18-99390 is a replacement ignition trigger built for 4 cylinder Mercury and Mariner outboard engines produced between 1976 and 1997. The trigger is a core ignition timing component: it generates the signal that tells the ignition module precisely when to fire each cylinder, so a worn, cracked, or intermittently failing trigger is a common cause of misfires, rough idle, hard starting, or a complete no-spark condition on these engines.\u003c\/p\u003e\u003cp\u003eThis trigger cross-references directly to part number 134-6452, making it straightforward to confirm you are ordering the correct unit for your 4 cylinder Mercury\/Mariner powerhead. It is a compact assembly measuring 6 x 6 x 1.75 inches and weighing 0.5 pounds, sized to mount in the same location as the original trigger it replaces, underneath the flywheel on applicable 4 cylinder Mercury and Mariner outboards.\u003c\/p\u003e\u003cp\u003eBecause ignition timing accuracy directly affects starting reliability, smooth running, and fuel efficiency, replacing a failing trigger with a properly specified unit like the Sierra 18-99390 restores consistent spark timing rather than masking a deeper ignition fault.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99390\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 6 x 6 x 1.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394233\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 134-6452\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e 4 Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercury\/Mariner outboards, 1976-1997\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury outboards, 4 Cylinder, 1976-1997\u003c\/li\u003e\n\u003cli\u003eMariner outboards, 4 Cylinder, 1976-1997\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e134-6452\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99390 trigger fit?\u003c\/strong\u003e The Sierra 18-99390 trigger fits 4 cylinder Mercury and Mariner outboards built between 1976 and 1997.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99390 the same as part number 134-6452?\u003c\/strong\u003e Yes, 134-6452 is the cross-reference number for the Sierra 18-99390 trigger, so it installs and functions in place of that number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this trigger weigh?\u003c\/strong\u003e The Sierra 18-99390 trigger weighs 0.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-99390 trigger?\u003c\/strong\u003e This trigger measures 6 x 6 x 1.75 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this trigger work on a 6 or 8 cylinder Mercury outboard?\u003c\/strong\u003e No, the Sierra 18-99390 is built specifically for 4 cylinder Mercury\/Mariner outboards from 1976 to 1997, not other cylinder counts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99390 fit both Mercury and Mariner outboards?\u003c\/strong\u003e Yes, this trigger fits 4 cylinder Mercury and Mariner outboards built between 1976 and 1997.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is assigned to this part?\u003c\/strong\u003e The Sierra 18-99390 trigger carries UPC 808282394233.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99390 a genuine Sierra part or a generic aftermarket copy?\u003c\/strong\u003e The 18-99390 is a Sierra-branded replacement trigger that cross-references to OEM\/aftermarket number 134-6452.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a trigger actually do in the ignition system?\u003c\/strong\u003e A trigger generates the timing signal that tells the ignition module when to fire each cylinder, so a failing trigger like the one replaced by Sierra 18-99390 can cause misfires, hard starting, or no spark.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the Sierra 18-99390 trigger myself?\u003c\/strong\u003e Replacing the Sierra 18-99390 trigger is a standard ignition component swap that involves removing the flywheel to access the trigger assembly on 4 cylinder Mercury\/Mariner outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat do I receive when I order this part?\u003c\/strong\u003e Ordering the Sierra 18-99390 gets you one replacement ignition trigger assembly for 4 cylinder Mercury\/Mariner outboards, 1976-1997.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443115739,"sku":"SIE-18-99390","price":115.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-134-6452_lg__65351.1558113037.500.750.jpg?v=1785188563"},{"product_id":"oil-warning-module-for-mercury-mariner-2-stroke-outboards-1990-1999-2-3-4-cylinder-oil-injection-sportjet-sierra-18-99411","title":"Sierra Oil Warning Module 18-99411 for Mercury\/Mariner 2\/3\/4-Cylinder 2-Stroke Outboards, 1990-1999","description":"\u003cp\u003eThe Sierra 18-99411 oil warning module is a replacement component for the oil injection system on Mercury and Mariner 2-stroke outboard engines. It is built for 2, 3, and 4 cylinder outboard and SportJet engines that use oil injection, covering model years 1990 through 1999. An oil warning module of this type monitors the oil injection system and signals an alert if the system detects a low oil condition, helping protect the engine from running with inadequate lubrication.\u003c\/p\u003e\u003cp\u003eThe module has a metal housing for durability in a marine engine compartment and is compact enough to fit into existing wiring and mounting locations on covered engines. It ships as a single unit and is identified for ordering purposes by Sierra part number 18-99411.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99411\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine Brand:\u003c\/strong\u003e Mercury\/Mariner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Type:\u003c\/strong\u003e 2\/3\/4-cylinder 2-stroke outboard and SportJet engines with oil injection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Years:\u003c\/strong\u003e 1990-1999\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 2 x 4 x 8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394424\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury\/Mariner 2\/3\/4-cylinder 2-stroke outboard and SportJet engines with oil injection, 1990-1999\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard engines fit the Sierra 18-99411 oil warning module?\u003c\/strong\u003e This module fits Mercury\/Mariner 2\/3\/4-cylinder 2-stroke outboard and SportJet engines equipped with oil injection, for model years 1990 through 1999.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does an oil warning module do?\u003c\/strong\u003e An oil warning module monitors the oil injection system on a 2-stroke outboard and triggers a warning signal if the system detects a low oil condition, which helps prevent engine damage from inadequate lubrication. The Sierra 18-99411 performs this function on covered Mercury\/Mariner engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99411 oil warning module weigh?\u003c\/strong\u003e It weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this oil warning module?\u003c\/strong\u003e The Sierra 18-99411 measures 2 x 4 x 8 inches (L x W x H).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-99411 housing made of?\u003c\/strong\u003e The housing is made of metal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this module work on 2-cylinder, 3-cylinder, and 4-cylinder outboards?\u003c\/strong\u003e Yes, the Sierra 18-99411 is designed for 2, 3, and 4 cylinder Mercury\/Mariner 2-stroke outboard and SportJet engines with oil injection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the oil warning module only for engines with oil injection?\u003c\/strong\u003e Yes, the Sierra 18-99411 is intended for Mercury\/Mariner 2-stroke outboards and SportJet engines that use an oil injection system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e One Sierra 18-99411 oil warning module ships as a single item.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this fit an outboard built before 1990 or after 1999?\u003c\/strong\u003e The Sierra 18-99411 is designated for Mercury\/Mariner 2\/3\/4-cylinder 2-stroke outboard and SportJet engines from model years 1990-1999; fitment outside that range is not specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWho should install the Sierra 18-99411 oil warning module?\u003c\/strong\u003e Because it is part of the oil injection warning circuit, installation of the 18-99411 should be performed by a qualified marine technician familiar with your outboard's wiring and service procedures.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443312347,"sku":"SIE-18-99411","price":152.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-144-4857-16_lg__15879.1558111500.500.750.jpg?v=1785187980"},{"product_id":"sierra-18-99415-ignition-trigger-for-mercury-mariner-4-cylinder-outboards-1996-2006-80-jet-100-115-125-hp-replaces-855746a21-834821t","title":"Sierra 18-99415 4-Cylinder CDM Trigger for Mercury Mariner 80 JET, 100, 115, 125 HP 1996-2006","description":"\u003cp\u003eThe Sierra 18-99415 is a 4-cylinder CDM (Capacitor Discharge Module) trigger built for Mercury and Mariner outboard engines. This ignition component signals the CDM at the correct point in the engine cycle so each cylinder fires at the right time, making it a key part of the outboard's ignition timing system. It is constructed of plastic for durable service in the marine engine compartment.\u003c\/p\u003e\u003cp\u003eThis trigger is designed to fit Mercury outboards rated 80 JET, 100, 115, and 125 HP built in 1996-2006. It is a direct replacement for a failed or worn factory trigger and is intended for owners and marine technicians replacing ignition components as part of a tune-up or troubleshooting a misfire, hard-starting, or no-spark condition on a compatible 4-cylinder Mercury or Mariner outboard.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99415\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Outboard Stator and Trigger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cylinders:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Brand:\u003c\/strong\u003e Mercury \/ Mariner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Horsepower:\u003c\/strong\u003e 80 JET, 100, 115, 125 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Years:\u003c\/strong\u003e 1996-2006\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394462\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury \/ Mariner outboards, 1996-2006, 80 JET, 100, 115, and 125 HP\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e134-4513-4\u003c\/li\u003e\n\u003cli\u003e834821T\u003c\/li\u003e\n\u003cli\u003e854513 T\u003c\/li\u003e\n\u003cli\u003e855746A 2\u003c\/li\u003e\n\u003cli\u003e855746A21\u003c\/li\u003e\n\u003cli\u003e855748A 2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99415 trigger fit?\u003c\/strong\u003e The Sierra 18-99415 fits Mercury and Mariner outboard engines rated 80 JET, 100, 115, and 125 HP built in 1996-2006.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99415 a direct replacement for the factory Mercury trigger?\u003c\/strong\u003e Yes, the 18-99415 is a direct-fit replacement trigger for the applicable 4-cylinder Mercury and Mariner outboards, and it cross-references to OEM numbers 134-4513-4, 834821T, 854513 T, 855746A 2, 855746A21, and 855748A 2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many cylinders is this trigger designed for?\u003c\/strong\u003e The Sierra 18-99415 is a 4-cylinder CDM trigger, matched to the 4-cylinder Mercury and Mariner outboards it is compatible with.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the trigger made of?\u003c\/strong\u003e The Sierra 18-99415 trigger is made of plastic, suited to the marine engine compartment environment it operates in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a CDM trigger do on an outboard engine?\u003c\/strong\u003e A CDM trigger sends a timing signal to the ignition's capacitor discharge module so each of the engine's cylinders fires at the correct point in the cycle; on the Sierra 18-99415 this signal is provided for 4-cylinder Mercury and Mariner outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate the trigger needs to be replaced?\u003c\/strong\u003e Misfiring, hard starting, or a no-spark condition on a compatible 4-cylinder Mercury or Mariner outboard can point to a failed trigger, which the Sierra 18-99415 is designed to replace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99415 weigh?\u003c\/strong\u003e The Sierra 18-99415 trigger weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-99415 replace part number 134-4513-4?\u003c\/strong\u003e Yes, 134-4513-4 is one of the OEM cross-reference numbers the Sierra 18-99415 replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the Sierra 18-99415 fit a 150 HP Mercury outboard?\u003c\/strong\u003e No, the Sierra 18-99415 is compatible with Mercury and Mariner outboards rated 80 JET, 100, 115, and 125 HP from 1996-2006; a 150 HP engine is outside its listed fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this trigger sold as a single unit?\u003c\/strong\u003e Yes, the Sierra 18-99415 trigger is sold as one unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat years of Mercury\/Mariner outboards use this trigger?\u003c\/strong\u003e The Sierra 18-99415 covers model years 1996-2006 on the applicable 80 JET, 100, 115, and 125 HP Mercury and Mariner outboards.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443443419,"sku":"SIE-18-99415","price":128.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-134-4513-4_lg__47407.1558112885.500.750.jpg?v=1785188224"},{"product_id":"marine-wiring-harness-for-johnson-evinrude-20-25-35-hp-outboards-1977-1981-replaces-oem-389269-round-plug-2-cylinder","title":"Sierra Wiring Harness 18-99422 for Johnson\/Evinrude 20, 25, 35 HP Round Plug Outboards, 1977-1981","description":"\u003cp\u003eThe Sierra 18-99422 is a replacement engine wiring harness built for Johnson and Evinrude outboards that use a round plug connector. It carries the main engine-to-control wiring for 20 HP, 25 HP, and 35 HP round-plug outboards from the 1977-1981 model years, giving owners a direct way to restore or replace deteriorated, cracked, or corroded factory wiring without splicing in a universal harness. Marine wiring harnesses like this one are a common failure point on older outboards, since constant vibration, saltwater exposure, and UV exposure break down the insulation and connector contacts over time, leading to intermittent gauges, stalling, or a no-start condition. Installing a correctly matched harness restores factory-style connections at the engine and control box, keeping the wiring routed and terminated the way the outboard was originally designed.\u003c\/p\u003e\u003cp\u003eThis harness is a direct fit for the listed Johnson\/Evinrude round plug engines and is cross-referenced to the OEM wiring harness numbers below, so it installs in place of the original part without modification. It ships as a single, complete harness assembly ready to connect at both ends.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99422\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Round Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions (L x W x H):\u003c\/strong\u003e 7 x 9 x 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394530\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude 20 HP, 25 HP, and 35 HP outboards with a round plug connector, 1977-1981\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e389269\u003c\/li\u003e\n\u003cli\u003e387872\u003c\/li\u003e\n\u003cli\u003e389764\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99422 wiring harness fit?\u003c\/strong\u003e It fits Johnson\/Evinrude outboards with a round plug connector in 20 HP, 25 HP, and 35 HP, model years 1977-1981.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99422 harness a direct OEM replacement?\u003c\/strong\u003e Yes, Sierra 18-99422 is a direct replacement that installs in place of the original harness without modification, using the same round plug connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-99422 replace?\u003c\/strong\u003e It replaces OEM numbers 389269, 387872, and 389764 on the covered Johnson\/Evinrude round plug outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the wiring harness weigh?\u003c\/strong\u003e The Sierra 18-99422 wiring harness weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the harness as packaged?\u003c\/strong\u003e The 18-99422 harness measures 7 x 9 x 2.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of connector does this harness use?\u003c\/strong\u003e Sierra 18-99422 uses a round plug connector, matching the factory setup on the covered 20, 25, and 35 HP Johnson\/Evinrude engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness work on a square plug outboard?\u003c\/strong\u003e No, the 18-99422 is built for round plug engines only; a square plug outboard requires a different harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many harnesses come in the package?\u003c\/strong\u003e One complete wiring harness assembly ships per package (18-99422).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes replacing the wiring harness require cutting or splicing?\u003c\/strong\u003e No, because 18-99422 is a direct-fit replacement for the OEM harness, it connects using the original round plug terminations without cutting or splicing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate a Johnson\/Evinrude outboard needs a new wiring harness?\u003c\/strong\u003e Cracked or corroded insulation, intermittent gauge readings, stalling, or a no-start condition on a 1977-1981 round plug engine often point to a failing harness, which the 18-99422 is designed to replace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this harness only for Evinrude, or does it also fit Johnson engines?\u003c\/strong\u003e It fits both Johnson and Evinrude outboards, since the two brands shared the same round plug engine electrical systems covered by part 18-99422.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443476187,"sku":"SIE-18-99422","price":178.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-9914_lg__45873.1558112658.500.750.jpg?v=1785188564"},{"product_id":"sierra-18-99428-trigger-for-mercury-mariner-4-cylinder-outboards","title":"Sierra Trigger for Mercury Mariner 4-Cylinder Outboard Motors - 18-99428","description":"\u003cp\u003eThe Sierra 18-99428 trigger is an ignition timing component built for Mercury and Mariner 4-cylinder outboard motors. The trigger works as part of the ignition system, sending timing signals to the switch box so spark fires at the correct point in the engine cycle. A trigger that has failed or is reading inconsistently is a common cause of hard starting, engine misfire, rough idle, or a no-spark condition on 4-cylinder Mercury and Mariner outboards. Replacing a worn or damaged trigger with a properly matched unit restores accurate ignition timing and helps the engine run smoothly across the RPM range.\u003c\/p\u003e\u003cp\u003eThis trigger is sold as a standalone replacement part, letting you address an ignition timing fault without replacing the entire ignition system. It is designed to install in place of the original trigger using the existing mounting points on 4-cylinder Mercury and Mariner powerheads.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99428\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Mercury Mariner Trigger - 4 Cyl.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Outboard Stator and Trigger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Configuration:\u003c\/strong\u003e 4-cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394592\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury and Mariner 4-cylinder outboard motors\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99428 trigger used for?\u003c\/strong\u003e The Sierra 18-99428 is an ignition trigger that sends timing signals to the switch box on Mercury and Mariner 4-cylinder outboard motors, allowing the ignition system to fire spark at the correct point in the engine cycle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines does the 18-99428 trigger fit?\u003c\/strong\u003e This trigger is designed for Mercury and Mariner 4-cylinder outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are signs that a trigger needs to be replaced?\u003c\/strong\u003e Hard starting, misfiring, rough idle, and no-spark conditions on a 4-cylinder Mercury or Mariner outboard can point to a failed or failing trigger such as the 18-99428.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99428 trigger weigh?\u003c\/strong\u003e The Sierra 18-99428 trigger weighs 0.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99428 an OEM or aftermarket part?\u003c\/strong\u003e The 18-99428 is a Sierra-branded replacement trigger manufactured to work as an ignition component on 4-cylinder Mercury and Mariner outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99428 replace the entire ignition system?\u003c\/strong\u003e No, the 18-99428 is a standalone trigger component, letting you replace just the failed timing trigger rather than the full ignition system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering part 18-99428?\u003c\/strong\u003e Ordering the Sierra 18-99428 includes the trigger unit itself for installation on a 4-cylinder Mercury or Mariner outboard.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-99428 trigger be used on non-Mercury outboards?\u003c\/strong\u003e The 18-99428 is built specifically for Mercury and Mariner 4-cylinder outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-99428 trigger?\u003c\/strong\u003e The Sierra 18-99428 trigger carries UPC 808282394592.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443574491,"sku":"SIE-18-99428","price":127.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/i_6974e46b-4d59-4459-8075-60c29656def9.jpg?v=1785353674"},{"product_id":"johnson-evinrude-wiring-harness-for-40-50-60-66-hp-crossflow-2-cyl-1979-1984-replaces-oem-583005-sierra-18-99427","title":"Sierra Johnson\/Evinrude Wiring Harness 18-99427, 2 Cylinder, Fits 1979-1984 40-66 HP Cross Flow Engines","description":"\u003cp\u003eThe Sierra 18-99427 wiring harness is a direct replacement wiring harness built for 2-cylinder Johnson\/Evinrude Cross Flow outboard engines. It carries the ignition, charging, and control wiring between the engine components and the control box, restoring a clean electrical connection on outboards where the original harness has cracked, corroded, or shorted out. The harness is constructed of insulated copper wire for reliable conductivity and uses a DIN connector for a factory-style plug-in fit.\u003c\/p\u003e\u003cp\u003eThis harness is sized for 1979-1984 Johnson\/Evinrude Cross Flow engines rated 40, 50, 60, and 66 HP. It ships as a single-piece harness assembly, making installation straightforward for anyone replacing a failed or deteriorated original harness rather than tracing and repairing individual wires.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99427\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Insulated Copper Wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e DIN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Count:\u003c\/strong\u003e 2 Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 7 x 9 x 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394585\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude Cross Flow engines, 1979-1984, 40, 50, 60 and 66 HP, 2 cylinder\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e767968\u003c\/li\u003e\n\u003cli\u003e583005\u003c\/li\u003e\n\u003cli\u003e582061\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99427 wiring harness fit?\u003c\/strong\u003e The Sierra 18-99427 harness fits 2-cylinder Johnson\/Evinrude Cross Flow outboard engines from 1979-1984 rated 40, 50, 60, and 66 HP.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this harness replace?\u003c\/strong\u003e It replaces OEM Johnson\/Evinrude part numbers 767968, 583005, and 582061.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the wiring made from?\u003c\/strong\u003e The harness uses insulated copper wire throughout for reliable electrical conductivity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat connector type does the harness use?\u003c\/strong\u003e A DIN connector is used, matching the factory connection point on compatible Johnson\/Evinrude Cross Flow engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99427 harness weigh?\u003c\/strong\u003e This wiring harness weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the harness as packaged?\u003c\/strong\u003e The harness measures 7 x 9 x 2.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a complete engine harness or individual wires?\u003c\/strong\u003e The 18-99427 is supplied as a single complete harness assembly, not individual wires, so it installs as one unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many cylinders is this harness designed for?\u003c\/strong\u003e It is designed specifically for 2-cylinder Johnson\/Evinrude Cross Flow engines, not 3-, 4-, or 6-cylinder models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99427 harness fit engines outside the 1979-1984 range?\u003c\/strong\u003e No, this harness is specified for the 1979-1984 model years on the covered 40-66 HP Cross Flow engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many of these come in a package?\u003c\/strong\u003e The 18-99427 wiring harness ships as a single item, one harness per package.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443672795,"sku":"SIE-18-99427","price":168.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-9915_lg__47979.1558112728.500.750.jpg?v=1785188278"},{"product_id":"sierra-18-99420-wiring-harness-for-mercury-mariner-outboards-replaces-84-76295-fits-20-hp-2-cyl-and-50-80-85-hp-4-cyl-1976-1981","title":"Sierra Wiring Harness 18-99420 - Replaces 84-73369 - Mercury\/Mariner 20 HP (1977-1981), 50\/80\/85 HP (1976-1979)","description":"\u003cp\u003eThe Sierra 18-99420 is a wiring harness engineered for Mercury\/Mariner outboard engines, built with copper conductors for reliable electrical continuity between the engine and control system. It is designed to fit 20 HP (2 cylinder) outboards from 1977-1981 as well as 50, 80, and 85 HP (4 cylinder) outboards from 1976-1979. The harness uses spade-style connectors for a secure, corrosion-resistant connection point and is designed to exit through the side of the lower cowling, matching the factory routing on these engines.\u003c\/p\u003e\u003cp\u003eThis harness is a direct replacement for a number of original Mercury\/Mariner part numbers, making it a straightforward swap for boat owners dealing with a cracked, corroded, or failed factory harness. Copper wiring construction supports dependable current flow to ignition and charging components, helping restore consistent engine electrical performance. The 18-99420 measures 7 x 9 x 2.5 inches and weighs 1.3 pounds, and it ships as a single complete harness ready for installation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99420\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Spade\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 7 x 9 x 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Type:\u003c\/strong\u003e Auxiliary\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Exit:\u003c\/strong\u003e Side of lower cowling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 harness\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mariner 20 HP (2 cylinder), 1977-1981\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 50, 80, and 85 HP (4 cylinder), 1976-1979\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e84-76295\u003c\/li\u003e\n\u003cli\u003e84-76295A1\u003c\/li\u003e\n\u003cli\u003e84-73447\u003c\/li\u003e\n\u003cli\u003e84-73447A1\u003c\/li\u003e\n\u003cli\u003e84-64997\u003c\/li\u003e\n\u003cli\u003e84-73369\u003c\/li\u003e\n\u003cli\u003e84-73369A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99420 wiring harness fit?\u003c\/strong\u003e The Sierra 18-99420 fits Mercury\/Mariner 20 HP (2 cylinder) outboards from 1977-1981, and Mercury\/Mariner 50, 80, and 85 HP (4 cylinder) outboards from 1976-1979.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99420 a direct replacement for the original Mercury harness?\u003c\/strong\u003e Yes, the Sierra 18-99420 is designed to replace the OEM Mercury\/Mariner harness on the applicable engines, with a matching electrical layout for a direct fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does the 18-99420 cross-reference?\u003c\/strong\u003e The Sierra 18-99420 replaces Mercury\/Mariner part numbers 84-76295, 84-76295A1, 84-73447, 84-73447A1, 84-64997, 84-73369, and 84-73369A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the wiring made from?\u003c\/strong\u003e The 18-99420 harness uses copper wiring, which provides reliable conductivity for engine electrical circuits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow big is the 18-99420 wiring harness?\u003c\/strong\u003e This harness measures 7 x 9 x 2.5 inches and weighs 1.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of connectors does this harness use?\u003c\/strong\u003e The Sierra 18-99420 is fitted with spade-style connectors for making secure electrical connections at the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the harness route through the engine cowling?\u003c\/strong\u003e On the applicable Mercury\/Mariner engines, the 18-99420 harness is designed to exit through the side of the lower cowling, matching the original factory routing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness fit a Mercury outboard outside the listed year ranges?\u003c\/strong\u003e The 18-99420 is specified for Mercury\/Mariner 20 HP (2 cylinder) engines from 1977-1981 and 50\/80\/85 HP (4 cylinder) engines from 1976-1979; fitment outside those years is not confirmed, so buyers should verify against their engine's original part number before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99420 come as a complete harness?\u003c\/strong\u003e Yes, the 18-99420 ships as a single complete wiring harness ready to install, with a unit count of one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-99420 a genuine Mercury part or an aftermarket replacement?\u003c\/strong\u003e The 18-99420 is a Sierra-brand replacement harness built to match and replace the original Mercury\/Mariner factory harness, rather than being sold under the Mercury brand itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace my outboard's wiring harness?\u003c\/strong\u003e Wiring harnesses like the Sierra 18-99420 are typically replaced when the original harness has cracked insulation, corroded connectors, or intermittent electrical faults affecting ignition or charging circuits on the applicable Mercury\/Mariner engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443705563,"sku":"SIE-18-99420","price":235.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-414-3369_lg__52331.1722514870.500.750.jpg?v=1785188105"},{"product_id":"sierra-18-99432-trigger-for-mercury-mariner-6-cylinder-outboards","title":"Sierra Trigger for Mercury Mariner 6-Cylinder Outboards, Part 18-99432","description":"\u003cp\u003eThe Sierra 18-99432 is a trigger assembly built for Mercury Mariner 6-cylinder outboard engines. As part of the ignition system, the trigger works with the flywheel to signal the engine's timing components, helping the engine fire correctly at the right moment in each cylinder's cycle. Replacing a worn or failing trigger is a common step when diagnosing ignition issues such as hard starting, rough running, or intermittent misfires on applicable 6-cylinder Mercury Mariner outboards.\u003c\/p\u003e\u003cp\u003eThis part is sold under Sierra's marine parts line, which supplies replacement components for outboard and sterndrive engines. It is cataloged specifically for 6-cylinder Mercury Mariner applications, so it is intended as a direct fit for engines in that configuration rather than a universal part.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Mercury Mariner Trigger - 6 Cyl.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Stators \u0026amp; Triggers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394639\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e6-cylinder Mercury Mariner outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99432 trigger fit?\u003c\/strong\u003e The Sierra 18-99432 is built for 6-cylinder Mercury Mariner outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a trigger do in the ignition system?\u003c\/strong\u003e A trigger works with the engine's flywheel to signal the ignition system's timing components so each cylinder fires at the correct point in its cycle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99432 a genuine Sierra part?\u003c\/strong\u003e Yes, part number 18-99432 is manufactured and sold under the Sierra marine parts brand.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99432 trigger weigh?\u003c\/strong\u003e The Sierra 18-99432 trigger weighs 0.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms suggest the trigger needs replacing?\u003c\/strong\u003e Hard starting, rough running, or intermittent misfires on a 6-cylinder Mercury Mariner outboard can point to a failing trigger such as the Sierra 18-99432.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this trigger sold as a single component?\u003c\/strong\u003e The Sierra 18-99432 is sold as an individual trigger assembly under its own part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99432 work on 4-cylinder Mercury outboards?\u003c\/strong\u003e No, the 18-99432 is cataloged specifically for 6-cylinder Mercury Mariner outboard engines, not 4-cylinder models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is the 18-99432?\u003c\/strong\u003e Sierra part 18-99432 falls under Mercury outboard stators and triggers, the ignition-timing component group for these engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I look up the Sierra 18-99432 by its UPC?\u003c\/strong\u003e Yes, the Sierra 18-99432 trigger carries UPC 808282394639.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the trigger the same part as a stator?\u003c\/strong\u003e No, a trigger and a stator are different components within the same ignition system category; the Sierra 18-99432 is specifically the trigger, not the stator.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443738331,"sku":"SIE-18-99432","price":159.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-134-6456-15_lg__17066.1558113503.500.750.jpg?v=1785329188"},{"product_id":"sierra-18-99433-trigger-for-3-cylinder-mercury-and-mariner-outboards","title":"Sierra Trigger for Mercury Mariner 3-Cylinder Outboard Engines - 18-99433","description":"\u003cp\u003eThe Sierra 18-99433 is a trigger component built for Mercury Mariner 3-cylinder outboard engines. As part of the ignition system, the trigger works alongside the stator and related components to help generate the timing signal the engine's ignition system relies on for proper spark delivery. Sierra manufactures this trigger as a replacement component for boat owners and marine technicians servicing Mercury Mariner 3-cylinder outboards where the original trigger has failed or is due for replacement.\u003c\/p\u003e\u003cp\u003eThis part is categorized within Sierra's line of Mercury Outboard Stators and Triggers, a product family designed to restore ignition timing function on Mercury and Mariner outboard engines. Ordering by the exact part number, 18-99433, is the most reliable way to confirm this is the correct trigger for a 3-cylinder Mercury Mariner application before purchase.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Mercury Mariner Trigger - 3 Cyl.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Mercury Outboard Stators \u0026amp; Triggers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Configuration:\u003c\/strong\u003e 3 Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394646\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Mercury Mariner 3-cylinder outboard engines.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99433 trigger fit?\u003c\/strong\u003e The Sierra 18-99433 is built for Mercury Mariner 3-cylinder outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the part number for this trigger?\u003c\/strong\u003e This Mercury Mariner trigger is Sierra part number 18-99433.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99433 trigger weigh?\u003c\/strong\u003e The Sierra 18-99433 trigger weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category does this part fall under?\u003c\/strong\u003e Sierra lists the 18-99433 trigger under its Mercury Outboard Stators \u0026amp; Triggers category.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99433 an OEM Mercury part?\u003c\/strong\u003e The 18-99433 is manufactured by Sierra as a replacement trigger, not a Mercury-branded OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat function does the trigger serve in the ignition system?\u003c\/strong\u003e The trigger is an ignition system component that works with the stator to help generate the timing signal used for spark delivery on Mercury Mariner 3-cylinder outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this trigger work on a 4-cylinder or 6-cylinder Mercury outboard?\u003c\/strong\u003e No. The Sierra 18-99433 is specified for 3-cylinder Mercury Mariner outboard engines, not 4-cylinder or 6-cylinder configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99433 trigger?\u003c\/strong\u003e The UPC for the Sierra 18-99433 Mercury Mariner trigger is 808282394646.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm this is the right trigger for my outboard?\u003c\/strong\u003e Match the Sierra part number 18-99433 and confirm your outboard is a Mercury Mariner 3-cylinder model before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra make this trigger specifically for Mariner-branded engines too?\u003c\/strong\u003e Yes, the product name for part 18-99433 identifies it as a Mercury Mariner trigger for 3-cylinder engines, covering both Mercury and Mariner branding.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443803867,"sku":"SIE-18-99433","price":123.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-134-8302-3_lg__86164.1558113838.500.750.jpg?v=1785329188"},{"product_id":"sierra-18-99435-sensor-coil-for-johnson-evinrude-outboards-ignition-sensor-coil-replacement","title":"Sierra Sensor Coil for Johnson Evinrude Outboard Electrical Systems - 18-99435","description":"\u003cp\u003eThe Sierra 18-99435 Sensor Coil is a replacement electrical component built for Johnson Evinrude outboard engines. It is designed as a direct-fit replacement for the sensor coil used within the outboard's electrical system, restoring proper sensor function for engines that rely on this component for reliable operation.\u003c\/p\u003e\u003cp\u003eSierra manufactures this part to match the specifications of the original equipment, making it a straightforward swap when the factory sensor coil has failed or is showing signs of wear. Keeping this component in good working order helps maintain consistent electrical signal performance in the outboard's ignition and sensor circuitry.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99435\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394660\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson Evinrude outboard electrical system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Johnson Evinrude outboard engines equipped with this sensor coil.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo verified OEM cross-reference numbers are available for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99435 sensor coil used for?\u003c\/strong\u003e The Sierra 18-99435 is a sensor coil used in the electrical system of Johnson Evinrude outboard engines, providing the sensing function required for proper engine electrical operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this sensor coil fit my Johnson or Evinrude outboard?\u003c\/strong\u003e The Sierra 18-99435 is designed for Johnson Evinrude outboard engines that use this sensor coil in their electrical system; check your engine's original sensor coil part number to confirm compatibility before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99435 sensor coil weigh?\u003c\/strong\u003e This sensor coil weighs 0.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99435 a genuine Sierra part?\u003c\/strong\u003e Yes, part number 18-99435 is manufactured and sold by Sierra as a replacement sensor coil for Johnson Evinrude outboard electrical systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-99435 sensor coil?\u003c\/strong\u003e The Sierra 18-99435 sensor coil carries UPC 808282394660.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99435 come with mounting hardware?\u003c\/strong\u003e The listing for the Sierra 18-99435 sensor coil covers the coil component itself; no additional accessories are specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of outboard part is the Sierra 18-99435?\u003c\/strong\u003e It is classified within the Johnson Evinrude outboard electrical system category as a sensor coil replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the Sierra 18-99435 replace a failed factory sensor coil?\u003c\/strong\u003e Yes, this part is intended as a replacement for a worn or failed sensor coil in the Johnson Evinrude outboard electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there OEM cross-reference numbers for the Sierra 18-99435?\u003c\/strong\u003e No verified OEM cross-reference numbers are currently listed for the Sierra 18-99435 sensor coil.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443934939,"sku":"SIE-18-99435","price":135.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-133-0875K1_lg__09531.1558110937.500.750.jpg?v=1785329181"},{"product_id":"johnson-evinrude-wiring-harness-18-99431-replaces-oem-391818-fits-1982-1984-20-25-30-35-hp-2-cyl-cross-flow-outboards","title":"Sierra Wiring Harness 18-99431, Replaces 391818, Fits Johnson\/Evinrude 2 Cyl Cross Flow 20-35 HP 1982-1984","description":"\u003cp\u003eThe Sierra 18-99431 wiring harness is a direct-fit replacement wiring harness built for Johnson\/Evinrude 2 cylinder Cross Flow outboard engines. It supplies the connector runs needed to link the engine's ignition and charging components to the control box and gauges, restoring a clean, factory-style electrical connection when an original harness has cracked, corroded, or failed. The harness is constructed of copper conductors insulated in PVC or PE jacketing, materials chosen for resistance to moisture, fuel vapor, and the vibration common in an outboard engine compartment. It uses a marine engine connector interface, allowing it to mate with the factory-style plugs on compatible powerheads without modification.\u003c\/p\u003e\u003cp\u003eThis harness replaces OEM part number 391818 and fits Johnson\/Evinrude 2 cylinder Cross Flow outboards from 1982-1984 rated at 20, 25, 30, and 35 HP. Replacing a deteriorated wiring harness restores reliable continuity across the ignition circuit, helping eliminate intermittent starting, stalling, or charging issues traced to worn or brittle wiring.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 391818\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper, PVC or PE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 9 x 7 x 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Marine Engine Connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394622\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude 2 Cylinder Cross Flow outboards, 1982-1984, 20, 25, 30 and 35 HP\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e391818\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99431 wiring harness fit?\u003c\/strong\u003e The Sierra 18-99431 wiring harness fits Johnson\/Evinrude 2 cylinder Cross Flow outboards from 1982-1984 rated at 20, 25, 30, and 35 HP.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does this harness replace?\u003c\/strong\u003e Sierra 18-99431 replaces OEM part number 391818 on compatible Johnson\/Evinrude 2 cylinder Cross Flow outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99431 harness made of?\u003c\/strong\u003e It is built with copper conductors insulated in PVC or PE jacketing, materials selected for durability against moisture and vibration in the engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this wiring harness weigh?\u003c\/strong\u003e The Sierra 18-99431 wiring harness weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the harness?\u003c\/strong\u003e The harness measures 9 x 7 x 2.5 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this harness use the factory connector?\u003c\/strong\u003e Yes, part number 18-99431 uses a marine engine connector designed to mate with the factory-style plugs on compatible Johnson\/Evinrude powerheads.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness work on a 3 or 4 cylinder Johnson\/Evinrude engine?\u003c\/strong\u003e No, the Sierra 18-99431 is built for 2 cylinder Cross Flow outboards only; a different harness is required for 3 or 4 cylinder applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a new replacement part or a repair kit for the original harness?\u003c\/strong\u003e The 18-99431 is a complete new replacement wiring harness, not a repair kit for the original wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the wiring harness on my outboard?\u003c\/strong\u003e A cracked, corroded, or brittle wiring harness can cause intermittent starting, stalling, or charging problems; replacing it with the Sierra 18-99431 restores a clean, continuous connection between the engine and control box.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99431 include connectors at both ends?\u003c\/strong\u003e Yes, the harness comes complete with its marine engine connector interface for connecting to the engine's ignition and charging components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99431 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-99431 is an aftermarket replacement harness manufactured to replace OEM part number 391818 on the applicable Johnson\/Evinrude engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444131547,"sku":"SIE-18-99431","price":157.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-1818_lg__36951.1558111376.500.750.jpg?v=1785188066"},{"product_id":"sierra-18-99441-trigger-for-mercury-mariner-2-cylinder-outboards","title":"Sierra Trigger for Mercury Mariner 2-Cylinder Outboards, Part Number 18-99441","description":"\u003cp\u003eThe Sierra 18-99441 is an ignition trigger built for Mercury and Mariner 2-cylinder outboard engines. The trigger is a core component of the outboard's ignition system, working with the stator and switch box to signal spark timing to each cylinder as the flywheel rotates. Replacing a worn or failed trigger restores consistent spark timing, which is essential for reliable starting, smooth idle, and correct engine performance across the rpm range.\u003c\/p\u003e\u003cp\u003eThis trigger is sold under Sierra part number 18-99441 and is listed within Sierra's Mercury Outboard Stators \u0026amp; Triggers category, so it is cataloged specifically as an ignition-system replacement part for Mercury and Mariner 2-cylinder outboard applications. Boat owners and marine technicians use parts like this when diagnosing no-spark, intermittent spark, or misfire conditions traced back to the ignition trigger rather than the coil, stator, or switch box.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99441\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Mercury Mariner Trigger - 2 Cyl.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Stators \u0026amp; Triggers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394790\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99441 trigger fit?\u003c\/strong\u003e Sierra part number 18-99441 is cataloged as a trigger for Mercury and Mariner 2-cylinder outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat part is Sierra 18-99441?\u003c\/strong\u003e It is an ignition trigger, the component that signals spark timing to the ignition system as the outboard's flywheel rotates.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99441 trigger weigh?\u003c\/strong\u003e The Sierra 18-99441 trigger weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this trigger sold by Sierra or a third-party brand?\u003c\/strong\u003e This trigger is a Sierra branded part, listed under Sierra part number 18-99441.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate a failing ignition trigger like the 18-99441?\u003c\/strong\u003e A worn or failed trigger on a Mercury or Mariner 2-cylinder outboard commonly causes no-spark, intermittent spark, or misfire conditions traced to the ignition system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99441 work with 4-cylinder or 6-cylinder Mercury outboards?\u003c\/strong\u003e No, Sierra 18-99441 is specifically cataloged for Mercury and Mariner 2-cylinder outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category does Sierra 18-99441 fall under?\u003c\/strong\u003e Sierra 18-99441 is listed in the Mercury Outboard Stators \u0026amp; Triggers category.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra Mercury Mariner trigger?\u003c\/strong\u003e The UPC for Sierra part 18-99441 is 808282394790.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the trigger work with the stator and switch box as a system?\u003c\/strong\u003e Yes, the ignition trigger works together with the stator and switch box to control spark timing on a Mercury or Mariner 2-cylinder outboard.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99441 trigger a direct replacement part?\u003c\/strong\u003e Sierra 18-99441 is cataloged as a replacement ignition trigger for Mercury and Mariner 2-cylinder outboard engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444164315,"sku":"SIE-18-99441","price":132.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-134-3960-2_lg__56639.1558112645.500.750.jpg?v=1785329188"},{"product_id":"sierra-18-99445-mercury-mariner-outboard-ignition-adapter-harness","title":"Sierra Mercury Mariner Adapter Harness 18-99445 Outboard Ignition System","description":"\u003cp\u003eThe Sierra Mercury Mariner Adapter Harness, part number 18-99445, is an ignition system adapter harness built for Mercury and Mariner outboard engines. It is designed to connect ignition system components within the outboard's wiring circuit, providing a dedicated harness solution for the ignition system rather than a universal or splice-in cable. This part is cataloged under Sierra's Mercury Outboard Ignition System category, so it is intended specifically for use within that ignition system application on Mercury and Mariner outboards.\u003c\/p\u003e\u003cp\u003eAs an adapter harness, its function is to provide the correct wiring connection points for ignition components on the applicable outboard, helping ensure a secure and proper electrical connection rather than relying on generic wire splicing. Each unit is identified by UPC 808282396299 and weighs 3.3 pounds as shipped.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99445\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Mercury Mariner Adapter Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury Outboard Ignition System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396299\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.3 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is Sierra part 18-99445?\u003c\/strong\u003e Sierra 18-99445 is a Mercury Mariner Adapter Harness, an ignition system adapter harness cataloged for use in the Mercury Outboard Ignition System application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this harness fit both Mercury and Mariner outboards?\u003c\/strong\u003e Yes, the 18-99445 adapter harness is listed as a Mercury Mariner Adapter Harness, indicating it is intended for use with both Mercury and Mariner brand outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99445 adapter harness weigh?\u003c\/strong\u003e The Sierra Mercury Mariner Adapter Harness weighs 3.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this part?\u003c\/strong\u003e Sierra part 18-99445, the Mercury Mariner Adapter Harness, carries UPC 808282396299.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-99445 an ignition system part?\u003c\/strong\u003e Yes, this adapter harness is categorized under the Mercury Outboard Ignition System, meaning it is used within the ignition wiring of applicable Mercury and Mariner outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there OEM cross-reference numbers listed for this harness?\u003c\/strong\u003e No OEM cross-reference or replacement numbers are published for the Sierra 18-99445 Mercury Mariner Adapter Harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99445 harness a genuine Sierra part?\u003c\/strong\u003e Yes, the 18-99445 Mercury Mariner Adapter Harness is a Sierra branded part identified by its own manufacturer part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does an adapter harness do in an outboard ignition system?\u003c\/strong\u003e An adapter harness like the 18-99445 provides the wiring connection points needed to link ignition system components on the outboard, in place of splicing individual wires.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the listing specify which model years this harness fits?\u003c\/strong\u003e No specific model years or engine models are listed for the Sierra Mercury Mariner Adapter Harness 18-99445.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category does Sierra 18-99445 fall under?\u003c\/strong\u003e The 18-99445 part is cataloged under the Mercury Outboard Ignition System category by Sierra.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444229851,"sku":"SIE-18-99445","price":239.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-421-4401_lg__79713.1753706451.500.750.jpg?v=1785329170"},{"product_id":"sierra-18-99448-wiring-harness-for-mercury-and-mariner-outboards","title":"Sierra Mercury Mariner Harness 18-99448 for Mercury Outboard Engines","description":"\u003cp\u003eThe Sierra Mercury Mariner Harness, part number 18-99448, is a replacement harness designed for Mercury and Mariner outboard engines. It is built to Sierra's standard for fit and function as a direct replacement component within the Mercury Outboard Parts category, giving boat owners and technicians a reliable option when the original harness on their outboard needs replacing.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99448\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Mercury Mariner Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396329\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is Sierra part 18-99448?\u003c\/strong\u003e Sierra part 18-99448 is a Mercury Mariner Harness, a replacement harness for Mercury and Mariner outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99448 harness fit my outboard engine?\u003c\/strong\u003e The 18-99448 harness is listed under Sierra's Mercury Outboard Parts category as a Mercury Mariner Harness; confirm your engine model against Mercury's harness application before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99448 harness weigh?\u003c\/strong\u003e The Sierra Mercury Mariner Harness, part number 18-99448, weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-99448 a genuine Mercury part or aftermarket?\u003c\/strong\u003e Part 18-99448 is a Sierra-branded harness, made as a replacement component rather than a Mercury OEM-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra Mercury Mariner Harness?\u003c\/strong\u003e The UPC for Sierra part 18-99448, the Mercury Mariner Harness, is 808282396329.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99448 harness come with connectors installed?\u003c\/strong\u003e The listing for Sierra part 18-99448 covers the Mercury Mariner Harness itself; specific connector or terminal details are not specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there OEM cross-reference numbers for part 18-99448?\u003c\/strong\u003e No OEM cross-reference or interchange numbers are listed for Sierra part 18-99448.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category does the 18-99448 harness belong to?\u003c\/strong\u003e Sierra part 18-99448 is classified under Mercury Outboard Parts as a Mercury Mariner Harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the Sierra 18-99448 harness myself?\u003c\/strong\u003e The Mercury Mariner Harness, part 18-99448, is a replacement harness component; installation should follow standard practice for your specific Mercury or Mariner outboard, and a marine technician is recommended if you are unsure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the Sierra 18-99448 harness different from the original Mercury harness?\u003c\/strong\u003e Part 18-99448 is Sierra's version of the Mercury Mariner Harness, offered as a replacement for the original equipment harness on applicable Mercury and Mariner outboards.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444295387,"sku":"SIE-18-99448","price":103.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-414-0220_lg__31812.1632147982.500.750.jpg?v=1785329170"},{"product_id":"sierra-18-99447-boat-side-wiring-harness-20-ft-round-plug-for-johnson-evinrude-outboards-mpn-18-99447","title":"Sierra Boat-Side Wiring Harness 18-99447 for Johnson\/Evinrude Outboard Control Box, Round Plug, 20 Feet","description":"\u003cp\u003eThe Sierra 18-99447 is a boat-side wiring harness that connects a Johnson\/Evinrude outboard engine to its remote control box. It uses a round plug connector on the boat side and terminates in a red plug, making it straightforward to identify and connect during installation. The harness runs 20 feet long, giving installers enough length to route wiring from the transom-mounted engine connection point forward to the helm or console-mounted control box without needing to splice in extension wiring.\u003c\/p\u003e\u003cp\u003eConstructed with a polycarbonate (PC) housing at the connector, the harness is built to withstand the vibration, moisture, and temperature swings typical of a marine engine compartment and helm run. Because this harness is dedicated to Johnson\/Evinrude outboard electrical systems, it is intended as a direct replacement or upgrade for the boat-side portion of the engine-to-control wiring, restoring a clean, secure connection between the outboard and the control box.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99447\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson\/Evinrude Outboard Boat-Side Wiring Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Round Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug Color:\u003c\/strong\u003e Red\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 20 feet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polycarbonate (PC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396312\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Johnson\/Evinrude outboard engine electrical systems, connecting the engine to the remote control box.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are listed for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99447 wiring harness connect?\u003c\/strong\u003e The Sierra 18-99447 is a boat-side wiring harness that connects a Johnson\/Evinrude outboard engine to its remote control box.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the 18-99447 harness?\u003c\/strong\u003e It measures 20 feet long, which is enough to route from a transom-mounted Johnson\/Evinrude outboard connection point to a console or helm-mounted control box.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of connector does this harness use?\u003c\/strong\u003e The 18-99447 uses a round plug connector on the boat side, terminating in a red plug for easy identification during installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the plug on the Sierra 18-99447 made of?\u003c\/strong\u003e The plug housing is made of polycarbonate (PC), chosen for durability in a marine engine compartment environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99447 compatible with all outboard brands?\u003c\/strong\u003e No, the 18-99447 harness is built for Johnson\/Evinrude outboard electrical systems and is not designated for other outboard brands.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99447 harness weigh?\u003c\/strong\u003e The Sierra 18-99447 boat-side wiring harness weighs 2.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99447 come with any OEM cross-reference numbers?\u003c\/strong\u003e No OEM cross-reference or replacement part numbers are listed for the Sierra 18-99447 harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the plug on this harness?\u003c\/strong\u003e The boat-side plug on the Sierra 18-99447 is red.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-99447 be used to replace a damaged boat-side harness?\u003c\/strong\u003e Yes, the Sierra 18-99447 is intended as the boat-side wiring harness connecting a Johnson\/Evinrude outboard to its control box, making it suitable for replacing a worn or damaged harness in that role.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99447 harness pre-terminated with connectors?\u003c\/strong\u003e Yes, the Sierra 18-99447 ships with a round plug connector already installed on the boat side for direct connection to the control box.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444491995,"sku":"SIE-18-99447","price":297.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-473-9410_lg__86982.1722497961.500.750.jpg?v=1785188157"},{"product_id":"sierra-18-99444-wiring-harness-for-mercury-and-mariner-outboard-motors","title":"Sierra 18-99444 Wiring Harness for Mercury Mariner Outboard Electrical Systems","description":"\u003cp\u003eThe Sierra 18-99444 is a wiring harness engineered for Mercury Mariner outboard electrical systems. It is designed as a direct-fit electrical component for outboard motors that use this connection setup, providing the wiring pathway needed to keep engine electrical circuits connected and functioning correctly. As part of Sierra's marine engine parts lineup, this harness is built to standards suited for the marine environment where components are exposed to moisture, vibration, and temperature swings.\u003c\/p\u003e\u003cp\u003eThis harness is intended for technicians and boat owners performing electrical system repairs or replacements on Mercury Mariner outboards. Keeping the wiring harness in good condition helps maintain reliable starting, charging, and instrument functions on the outboard.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99444\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.4 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 736983854513\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eMercury Mariner outboard electrical systems.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are listed for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99444?\u003c\/strong\u003e It is a wiring harness made for Mercury Mariner outboard electrical systems, identified by Sierra part number 18-99444.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this harness weigh?\u003c\/strong\u003e The Sierra 18-99444 wiring harness weighs 1.4 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat outboard electrical systems is this harness designed for?\u003c\/strong\u003e Sierra part number 18-99444 is categorized for Mercury outboard electrical systems, specifically Mercury Mariner applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99444 an OEM or aftermarket part?\u003c\/strong\u003e The 18-99444 is a Sierra-branded part, sold under Sierra's own part number for Mercury Mariner outboard electrical systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99444?\u003c\/strong\u003e The UPC for the Sierra 18-99444 wiring harness is 736983854513.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99444 include cross-reference or OEM replacement numbers?\u003c\/strong\u003e No OEM cross-reference numbers are listed for the Sierra 18-99444 wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is the Sierra 18-99444?\u003c\/strong\u003e Sierra 18-99444 is listed under the Mercury Outboard Electrical System category as a wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWho would need to install the Sierra 18-99444?\u003c\/strong\u003e Anyone servicing or repairing the electrical wiring on a Mercury Mariner outboard motor would use the Sierra 18-99444 harness.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444557531,"sku":"SIE-18-99444","price":236.34,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-414-5532_lg__03649.1722508238.500.750.jpg?v=1785189046"},{"product_id":"johnson-evinrude-outboard-wiring-harness-sierra-18-99464-marine-engine-electrical-harness","title":"Sierra Wire Harness 18-99464 for Johnson Evinrude Outboard Electrical Systems","description":"\u003cp\u003eThe Sierra 18-99464 is a wire harness built for Johnson Evinrude outboard electrical systems. It is designed to serve as a reliable electrical connection component within the outboard's wiring setup, helping maintain proper electrical continuity across the motor's electrical system. As a Sierra-branded part, it is manufactured to fit within the Sierra marine parts lineup for Evinrude outboard applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99464\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson Evinrude outboard motors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396435\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99464?\u003c\/strong\u003e The Sierra 18-99464 is a wire harness made for Johnson Evinrude outboard electrical systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99464 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99464 is the Sierra manufacturer part number for this wire harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this wire harness weigh?\u003c\/strong\u003e The Sierra 18-99464 wire harness weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat outboard brand is the 18-99464 wire harness designed for?\u003c\/strong\u003e It is designed for Johnson Evinrude outboard motors as part of the outboard electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-99464?\u003c\/strong\u003e The UPC for the Sierra 18-99464 wire harness is 808282396435.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category does the 18-99464 fall under?\u003c\/strong\u003e Sierra 18-99464 is categorized as an Evinrude outboard electrical system component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99464 include connectors or terminals?\u003c\/strong\u003e Connector and terminal details are not specified for the Sierra 18-99464 wire harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-99464 be used to replace a worn or damaged harness?\u003c\/strong\u003e The Sierra 18-99464 is offered as a wire harness for the Johnson Evinrude outboard electrical system and can be sourced by this part number when replacing that component.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444590299,"sku":"SIE-18-99464","price":163.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-3282_lg__88113.1558112455.500.750.jpg?v=1785329193"},{"product_id":"chrysler-outboard-pre-amp-trigger-sierra-18-99465-ignition-trigger-assembly","title":"Sierra Pre-Amp Trigger 18-99465 for Chrysler Outboard Ignition Systems, Replaces CDI Electronics 135-4048","description":"\u003cp\u003eThe Sierra 18-99465 is a pre-amp trigger built for Chrysler outboard ignition systems. The trigger is a core component of the ignition system, generating the timing signal that the ignition module uses to fire the spark at the correct point in the engine cycle. As a pre-amp trigger, it works alongside the ignition module to condition and amplify this timing signal before it reaches the power pack, helping maintain consistent spark timing for reliable engine starting and running performance.\u003c\/p\u003e\u003cp\u003eThis trigger is a direct equivalent to CDI Electronics part number 135-4048, making it a straightforward replacement option for Chrysler outboard owners whose original trigger has failed or is due for replacement. It is a compact, lightweight component designed to install into the existing ignition system location on applicable Chrysler outboard engines.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99465\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Chrysler Outboard Ignition System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Pre-Amp Trigger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282395803\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Chrysler outboard engines using this ignition system's pre-amp trigger.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eCDI Electronics 135-4048\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99465 used for?\u003c\/strong\u003e It is a pre-amp trigger for Chrysler outboard ignition systems, generating the timing signal used to fire the spark at the correct point in the engine cycle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99465 cross-reference to a CDI Electronics part?\u003c\/strong\u003e Yes, Sierra 18-99465 is equivalent to CDI Electronics part number 135-4048.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99465 trigger weigh?\u003c\/strong\u003e The Sierra 18-99465 pre-amp trigger weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-99465 trigger fit?\u003c\/strong\u003e The 18-99465 is designed for Chrysler outboard ignition systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99465 a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-99465 is a Sierra-branded pre-amp trigger, sold under Sierra's own part number as a replacement for the equivalent CDI Electronics 135-4048 trigger.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when you order part number 18-99465?\u003c\/strong\u003e Ordering Sierra 18-99465 gets you the pre-amp trigger unit for Chrysler outboard ignition systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-99465 replace a failed CDI Electronics 135-4048 trigger?\u003c\/strong\u003e Yes, since the Sierra 18-99465 cross-references directly to CDI Electronics 135-4048, it can be used as a replacement for that part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of ignition component is the 18-99465?\u003c\/strong\u003e It is classified as a trigger, specifically a pre-amp trigger, within the Chrysler outboard ignition system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-99465 trigger straightforward?\u003c\/strong\u003e The 18-99465 is designed to install in place of the original pre-amp trigger within the Chrysler outboard ignition system, in the same mounting location as the equivalent CDI Electronics 135-4048 unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat part number should I search for to find this trigger?\u003c\/strong\u003e Search either Sierra 18-99465 or the cross-reference CDI Electronics 135-4048 to find this Chrysler outboard pre-amp trigger.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444688603,"sku":"SIE-18-99465","price":176.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/31nUV1ZOSrL.jpg?v=1784412362"},{"product_id":"sierra-18-99454-wiring-harness-for-mercury-mariner-outboard-electrical-systems","title":"Sierra Wire Harness 18-99454 for Mercury and Mariner Outboard Engines","description":"\u003cp\u003eThe Sierra 18-99454 is a wire harness engineered for Mercury and Mariner outboard engine electrical systems. It is built to carry and organize the engine's wiring runs, providing a reliable electrical connection point between engine-mounted components and the boat's control and power systems. A wire harness like this one protects individual wires from vibration, moisture, and abrasion by bundling them into a single, secured assembly, which reduces the chance of chafing, shorts, or connector failure that loose or unprotected wiring can develop over time on a boat engine.\u003c\/p\u003e\u003cp\u003eThis harness is sold as a direct-fit replacement component for the Mercury Outboard electrical system, making it a straightforward swap for a harness that has become brittle, corroded, or damaged. Because it is purpose-built for Mercury and Mariner outboard applications, it is designed to match the factory routing and connection points these engines use, simplifying installation compared to a universal or spliced-in alternative.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99454\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Mercury Mariner Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396350\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines is the Sierra 18-99454 wire harness designed for?\u003c\/strong\u003e This harness is built for Mercury and Mariner outboard engine electrical systems, part number 18-99454.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99454 harness weigh?\u003c\/strong\u003e It weighs 0.6 pounds, which is the weight of the Sierra Mercury Mariner Harness as shipped.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99454 an OEM or aftermarket part?\u003c\/strong\u003e It is a Sierra-branded replacement harness, sold under Sierra's own part number 18-99454 for the Mercury Outboard electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a wire harness like the 18-99454 do on an outboard engine?\u003c\/strong\u003e It bundles and protects the engine's electrical wiring runs, keeping connections organized and shielded from vibration, moisture, and abrasion in the Mercury Outboard electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99454 fit Mariner-branded outboards as well as Mercury?\u003c\/strong\u003e Yes, the 18-99454 is identified as a Mercury Mariner Harness, meaning it is designed for both Mercury and Mariner outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99454 harness?\u003c\/strong\u003e The UPC for this Mercury Mariner Harness is 808282396350.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-99454 harness replace a damaged or corroded factory harness?\u003c\/strong\u003e Yes, it is intended as a replacement wire harness for the Mercury Outboard electrical system when the original wiring has failed or corroded.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs any installation hardware included with the 18-99454?\u003c\/strong\u003e The listing for this Sierra part covers the wire harness itself; no additional included hardware is specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is the 18-99454?\u003c\/strong\u003e It is classified within the Mercury Outboard Electrical System category as a wire harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy choose a purpose-built harness over a universal replacement?\u003c\/strong\u003e The Sierra 18-99454 is made specifically for the Mercury and Mariner outboard electrical system, so its routing and connections are designed to match the application rather than requiring splicing or modification.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444786907,"sku":"SIE-18-99454","price":117.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-414-0043_lg__92320.1722500287.500.750.jpg?v=1785329193"},{"product_id":"johnson-evinrude-outboard-ignition-wiring-harness-sierra-18-99473-marine-replacement","title":"Sierra Ignition Wiring Harness 18-99473 for Johnson Evinrude Outboards","description":"\u003cp\u003eThe Sierra 18-99473 is an ignition wiring harness built for Johnson Evinrude outboard ignition systems. It is designed to connect and route ignition circuit wiring on compatible Johnson Evinrude outboard motors, giving boat owners and marine technicians a reliable replacement harness when an original harness has become brittle, corroded, or damaged from prolonged exposure to a marine engine bay environment. As part of Sierra's outboard ignition system component line, this harness is intended to restore proper electrical connections within the ignition circuit so the outboard's ignition components can communicate and function as designed.\u003c\/p\u003e\u003cp\u003eAt 0.9 pounds, it is a lightweight, compact component that is easy to handle during installation or when shipped as a replacement part. Each unit is identified by Sierra part number 18-99473 and UPC 808282396480, making it straightforward to confirm you are ordering the exact harness needed for your Johnson Evinrude outboard ignition system.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99473\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Ignition System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396480\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Johnson Evinrude outboard ignition systems.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are specified for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99473?\u003c\/strong\u003e It is a Johnson Evinrude ignition wiring harness, Sierra part number 18-99473, made to connect and route wiring within a Johnson Evinrude outboard ignition system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness fit my Johnson or Evinrude outboard?\u003c\/strong\u003e The Sierra 18-99473 is designed for Johnson Evinrude outboard ignition systems; confirm compatibility with your specific engine before ordering since exact model coverage is not listed here.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat brand makes part number 18-99473?\u003c\/strong\u003e Part number 18-99473 is manufactured by Sierra as part of its Evinrude Outboard Ignition System component line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99473 harness weigh?\u003c\/strong\u003e The Sierra 18-99473 ignition wiring harness weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow can I verify I am ordering the correct harness?\u003c\/strong\u003e Match the Sierra part number 18-99473 or UPC 808282396480 against your order confirmation to verify you have the correct ignition wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99473 an OEM or aftermarket part?\u003c\/strong\u003e The 18-99473 is a Sierra-branded replacement harness for Johnson Evinrude outboard ignition systems, sold under the Sierra brand rather than as an original Johnson Evinrude part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat ignition system components does this harness work with?\u003c\/strong\u003e The 18-99473 harness is categorized as part of the Evinrude Outboard Ignition System, intended to route wiring between ignition components on compatible outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the listing include specific horsepower or year coverage?\u003c\/strong\u003e No specific horsepower rating or model year range is specified for the Sierra 18-99473; it is identified generally for Johnson Evinrude outboard ignition systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this part?\u003c\/strong\u003e The Sierra 18-99473 ignition wiring harness carries UPC 808282396480.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace an ignition wiring harness like the 18-99473?\u003c\/strong\u003e An ignition wiring harness such as the Sierra 18-99473 is typically replaced when the original harness wiring becomes damaged, corroded, or brittle, which can disrupt ignition circuit connections on a Johnson Evinrude outboard.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444819675,"sku":"SIE-18-99473","price":250.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-4004_lg__21521.1722519049.500.750.jpg?v=1785329167"},{"product_id":"sierra-18-99486-wiring-harness-for-johnson-evinrude-outboard-motors","title":"Sierra Wire Harness 18-99486 for Johnson Evinrude Outboard Electrical Systems","description":"\u003cp\u003eThe Sierra 18-99486 wire harness is built for the electrical system on Johnson and Evinrude outboard motors, providing the wiring connections needed to keep engine electrical circuits linked and functioning correctly. As a Sierra replacement part, it is engineered to match the fit, connection points, and durability expected of outboard-rated wiring components, making it a straightforward option when an original harness has worn out, corroded, or been damaged.\u003c\/p\u003e\u003cp\u003eThis harness is designed as part of Sierra's Evinrude Outboard Electrical System lineup, so it is built to work within that electrical circuit rather than as a universal or generic wire. At 0.9 pounds, it is a lightweight component sized for installation directly into the outboard's existing wiring layout.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99486\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Johnson Evinrude Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396008\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99486 wire harness used for?\u003c\/strong\u003e The Sierra 18-99486 is a wire harness built for the Johnson and Evinrude outboard electrical system, connecting engine electrical circuits together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99486 harness made by Sierra?\u003c\/strong\u003e Yes, part number 18-99486 is manufactured by Sierra and is listed under its Evinrude Outboard Electrical System category.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99486 wire harness weigh?\u003c\/strong\u003e It weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99486 fit both Johnson and Evinrude outboards?\u003c\/strong\u003e Sierra lists the 18-99486 harness under its Johnson Evinrude Harness product line as part of the Evinrude Outboard Electrical System category.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99486 harness?\u003c\/strong\u003e The UPC for the Sierra 18-99486 Johnson Evinrude Harness is 808282396008.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-99486 a genuine Sierra part number or an aftermarket equivalent?\u003c\/strong\u003e 18-99486 is the Sierra part number itself, not a cross-referenced aftermarket equivalent.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is the 18-99486?\u003c\/strong\u003e It is classified as part of the Evinrude Outboard Electrical System category, specifically a wire harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering part 18-99486?\u003c\/strong\u003e Ordering Sierra part number 18-99486 includes the Johnson Evinrude wire harness itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace an outboard wire harness like the 18-99486?\u003c\/strong\u003e A wire harness such as the Sierra 18-99486 typically needs replacement when the original wiring in the outboard electrical system has become worn, corroded, or damaged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99486 harness a lightweight component?\u003c\/strong\u003e At 0.9 pounds, the 18-99486 harness is a lightweight electrical component designed for outboard installation.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444852443,"sku":"SIE-18-99486","price":232.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-3036_lg__48479.1722515991.500.750.jpg?v=1785329194"},{"product_id":"sierra-18-99480-round-plug-internal-engine-wiring-harness-for-johnson-evinrude-outboards","title":"Sierra Johnson\/Evinrude Round Plug Internal Engine Wiring Harness 18-99480","description":"\u003cp\u003eThe Sierra 18-99480 is a round plug internal engine wiring harness built for Johnson\/Evinrude outboard motors. It is an engine-mount style harness, meaning it is installed directly on the powerhead to carry the internal wiring connections between engine components. The round plug connector design matches the factory connection style used on compatible Johnson\/Evinrude outboards, allowing for a direct fit without modifying existing wiring.\u003c\/p\u003e\u003cp\u003eThis harness falls within the Evinrude outboard electrical system category, making it a relevant replacement or upgrade option for boat owners maintaining the ignition and engine wiring circuits on their outboard motor. At 0.9 pounds, it is a lightweight component that is straightforward to handle during installation or when swapping out a worn or damaged harness.\u003c\/p\u003e\u003cp\u003eSierra part number 18-99480 is the part number to reference when ordering, and it identifies this specific engine wiring harness within Sierra's outboard electrical parts offering.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99480\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Round Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Engine Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396046\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99480 used for?\u003c\/strong\u003e Sierra part number 18-99480 is an internal engine wiring harness with a round plug connector, designed for Johnson\/Evinrude outboard motors and installed at the engine mount.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this harness fit Johnson and Evinrude outboards?\u003c\/strong\u003e Yes, the 18-99480 harness is built for Johnson\/Evinrude outboard motors within the Evinrude outboard electrical system category.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99480 wiring harness weigh?\u003c\/strong\u003e The Sierra 18-99480 weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of connector does this harness use?\u003c\/strong\u003e This harness uses a round plug connector, matching the internal engine wiring connection style on compatible Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99480 an internal or external engine harness?\u003c\/strong\u003e It is an internal engine harness, mounted directly at the engine as part of the powerhead wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the Sierra 18-99480 mounted?\u003c\/strong\u003e The 18-99480 is an engine-mount type harness, meaning it attaches directly to the outboard engine rather than running external to the powerhead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat part number should I order to get this exact harness?\u003c\/strong\u003e Reference Sierra part number 18-99480 when ordering to ensure you receive this specific round plug internal engine wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is the 18-99480?\u003c\/strong\u003e The 18-99480 is classified within the Evinrude outboard electrical system category as a wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of this harness straightforward?\u003c\/strong\u003e At 0.9 pounds and using a round plug connector matched to the factory style, the 18-99480 is designed to install in place of the original internal engine harness without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99480 a replacement part for a worn harness?\u003c\/strong\u003e Yes, the 18-99480 is intended as a replacement wiring harness for the internal engine connections on applicable Johnson\/Evinrude outboard motors.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444917979,"sku":"SIE-18-99480","price":188.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-3284_lg__38064.1558112648.500.750.jpg?v=1785188277"},{"product_id":"johnson-evinrude-omc-outboard-wire-harness-sierra-18-99462-marine-electrical-replacement","title":"Sierra Wire Harness 18-99462 for Johnson Evinrude Outboard Motors","description":"\u003cp\u003eThe Sierra 18-99462 is a wire harness engineered for the electrical system of Johnson Evinrude outboard motors. It is designed to carry the ignition and charging circuit connections between the outboard's powerhead components, providing a direct-fit replacement for boaters whose factory harness has become brittle, corroded, or damaged from prolonged marine exposure. A wire harness of this type consolidates multiple individual wire runs into a single organized assembly, which simplifies routing, reduces the chance of chafing against engine components, and helps prevent intermittent electrical faults that can cause hard starting, stalling, or charging system failures.\u003c\/p\u003e\u003cp\u003eSierra manufactures its marine electrical parts to withstand the vibration, heat, and moisture exposure typical of an outboard powerhead environment. Replacing a worn or failing harness with the correct Sierra part helps restore reliable ignition and charging performance without having to splice or repair individual wires. This harness is intended for Johnson Evinrude outboard applications within the OMC electrical system family.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99462\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Wire Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson Evinrude outboard electrical system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396411\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson Evinrude outboard motors (OMC electrical system)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99462 used for?\u003c\/strong\u003e The Sierra 18-99462 is a wire harness for the electrical system of Johnson Evinrude outboard motors, carrying ignition and charging circuit connections between powerhead components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99462 fit any outboard brand?\u003c\/strong\u003e This harness, Sierra part number 18-99462, is designed for Johnson Evinrude outboard motors within the OMC electrical system, not for other outboard brands.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99462 wire harness weigh?\u003c\/strong\u003e The Sierra 18-99462 wire harness weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99462 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99462 is a Sierra manufacturer part number, and it is sold as a Sierra-branded wire harness rather than a generic aftermarket copy.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace my outboard's wire harness?\u003c\/strong\u003e A wire harness like the Sierra 18-99462 is typically replaced when the factory wiring becomes brittle, corroded, or damaged from marine exposure, which can cause hard starting, stalling, or charging system faults on Johnson Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99462 include connectors for installation?\u003c\/strong\u003e The Sierra 18-99462 is supplied as a complete wire harness assembly intended to connect into the Johnson Evinrude outboard's existing electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-99462?\u003c\/strong\u003e The Sierra 18-99462 wire harness carries UPC 808282396411.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan a failing wire harness cause charging problems on an outboard?\u003c\/strong\u003e Yes, a deteriorated harness can create intermittent connections in the ignition or charging circuit, and installing a replacement such as the Sierra 18-99462 addresses this on Johnson Evinrude outboard electrical systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-99462 a DIY job?\u003c\/strong\u003e Replacing a wire harness such as the Sierra 18-99462 involves disconnecting the old harness from the outboard's electrical components and connecting the new one in the same configuration, a task within reach of an owner comfortable with basic marine electrical work.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is 18-99462?\u003c\/strong\u003e Sierra part 18-99462 is classified as a wire harness within the Johnson Evinrude outboard electrical system category.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444950747,"sku":"SIE-18-99462","price":250.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-9902_lg__46664.1702910523.500.750.jpg?v=1785188689"},{"product_id":"sierra-18-99484-wiring-harness-for-mercury-mariner-outboards","title":"Sierra Mercury Mariner Engine Wiring Harness with Cannon Plug Connector, Part 18-99484","description":"\u003cp\u003eThe Sierra 18-99484 is an engine wiring harness built for Mercury Mariner outboard motors, part of Sierra's Mercury Outboard Electrical System lineup. It uses a cannon plug connector to link the outboard's engine-mounted wiring to the boat's control and ignition circuits, providing a secure, weather-resistant connection point that is standard on Mercury Mariner powerheads. Engine wiring harnesses like this one carry the electrical signals and power needed for ignition, gauges, and engine monitoring, so a sound connector and properly rated wiring are essential to reliable engine operation. At 0.8 pounds, the 18-99484 harness is a manageable, straightforward component to handle during installation or replacement of an aging or damaged engine harness. As a Sierra part, it is identified by part number 18-99484 and UPC 808282396022 for accurate ordering, helping boat owners and marine technicians source the correct electrical component for Mercury Mariner outboard electrical system service and repair work.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99484\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine Brand:\u003c\/strong\u003e Mercury Mariner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Cannon Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396022\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99484 wiring harness used for?\u003c\/strong\u003e The Sierra 18-99484 is an engine wiring harness used to connect the electrical wiring on Mercury Mariner outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat outboard brand does the 18-99484 harness fit?\u003c\/strong\u003e The 18-99484 harness is built for Mercury Mariner outboard engines as part of Sierra's Mercury Outboard Electrical System line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99484 harness use a cannon plug connector?\u003c\/strong\u003e Yes, the Sierra 18-99484 engine harness connects using a cannon plug connector.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99484 harness weigh?\u003c\/strong\u003e The 18-99484 wiring harness weighs 0.8 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC number for the 18-99484 harness?\u003c\/strong\u003e The UPC for the Sierra 18-99484 wiring harness is 808282396022.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99484 a genuine Sierra marine part?\u003c\/strong\u003e Yes, 18-99484 is a genuine Sierra part number for a Mercury Mariner engine wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is 18-99484 classified under?\u003c\/strong\u003e Sierra classifies part 18-99484 under its Mercury Outboard Electrical System category.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra publish OEM cross-reference numbers for the 18-99484 harness?\u003c\/strong\u003e No OEM cross-reference numbers are published for the Sierra 18-99484 wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99484 harness heavy to handle during installation?\u003c\/strong\u003e No, at 0.8 pounds the 18-99484 wiring harness is light and easy to handle during installation or replacement.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988445212891,"sku":"SIE-18-99484","price":233.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-414-6277_lg__61278.1722498913.500.750.jpg?v=1785189053"},{"product_id":"sierra-18-99485-engine-adapter-harness-johnson-evinrude-outboard-engine-to-mercury-control-box-wiring-adapter","title":"Sierra 18-99485 Engine Adapter Wiring Harness - Johnson\/Evinrude Engine to Mercury Control Box","description":"\u003cp\u003eThe Sierra 18-99485 is an engine adapter wiring harness built to connect a Johnson\/Evinrude outboard engine to a Mercury control box. It solves a common rigging problem for boat owners who are pairing mismatched engine and control box brands, letting the ignition and control wiring communicate correctly between the two systems without splicing or re-pinning the factory harnesses. The harness uses copper conductors insulated in PVC for reliable electrical conductivity and protection against the moisture, vibration, and temperature swings typical of a marine engine compartment. It is supplied as a complete, ready-to-install harness so the connection at both the engine side and the control box side is a direct plug-in fit for the intended application. This adapter is commonly used during engine repowers, control box upgrades, or dash swaps where the existing control box does not match the outboard engine's native wiring configuration. Because it is purpose-built as an adapter rather than a generic wiring segment, it keeps the ignition and control signal paths correctly aligned, reducing the risk of miswiring that can cause starting, throttle, or shift issues. The Sierra 18-99485 falls under Sierra's outboard ignition system parts line and is intended for technicians and boat owners performing this specific engine-to-control-box adaptation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99485\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Engine adapter wiring harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson\/Evinrude engine to Mercury control box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper conductors with PVC insulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude outboard ignition system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eConnects a Johnson\/Evinrude outboard engine to a Mercury control box.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are available for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99485 harness do?\u003c\/strong\u003e It adapts the wiring connection so a Johnson\/Evinrude outboard engine can be connected to a Mercury control box, aligning the ignition and control signal paths between the two brands.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness work with any Mercury control box?\u003c\/strong\u003e The Sierra 18-99485 is designed specifically to connect a Johnson\/Evinrude engine to a Mercury control box; no other control box or engine pairings are specified for this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the harness made of?\u003c\/strong\u003e The 18-99485 uses copper conductors with PVC insulation, a combination chosen for electrical conductivity and protection in a marine engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99485 weigh?\u003c\/strong\u003e It weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99485 come as a complete harness or do I need to splice wires?\u003c\/strong\u003e It is a complete adapter harness, made to connect the Johnson\/Evinrude engine and Mercury control box without requiring splicing of the factory wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need an engine-to-control-box adapter harness like this one?\u003c\/strong\u003e This type of harness is typically used during a repower, control box replacement, or dash upgrade where the outboard engine and control box are from different brands and their factory harnesses do not match.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there OEM cross-reference numbers for the Sierra 18-99485?\u003c\/strong\u003e No OEM cross-reference or replacement numbers are listed for the Sierra 18-99485 adapter harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is the Sierra 18-99485 classified under?\u003c\/strong\u003e Sierra lists the 18-99485 under its outboard ignition system parts for Evinrude applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99485 a genuine Sierra part?\u003c\/strong\u003e Yes, the 18-99485 is a Sierra-branded engine adapter harness, identified by Sierra's own part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat problem does mismatched engine and control box wiring cause without this adapter?\u003c\/strong\u003e Without a proper adapter such as the Sierra 18-99485, connecting a Johnson\/Evinrude engine directly to a Mercury control box can result in incorrect wiring alignment, which can cause starting, throttle, or shift signal issues.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988445245659,"sku":"SIE-18-99485","price":220.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-421-4301_lg__84687.1558111192.500.750.jpg?v=1785189014"},{"product_id":"sierra-18-99544-locator-ring-sensor-gap-ring-for-johnson-evinrude-2-cylinder-outboards","title":"Sierra Locator Ring 18-99544 for Johnson Evinrude 2 Cylinder Outboard Motors","description":"\u003cp\u003eThe Sierra Locator Ring 18-99544 is a precision setting tool used to establish the correct sensor and stator charge coil air gap on Johnson and Evinrude 2 cylinder outboard motors. Proper air gap between the trigger\/sensor components and the stator charge coils is essential for accurate ignition timing, and this locator ring provides a repeatable, consistent spacing reference so the gap can be set correctly during ignition system service, stator replacement, or general engine maintenance.\u003c\/p\u003e\u003cp\u003eDesigned as a purpose-built gauge rather than a general-purpose spacer, the locator ring removes the guesswork from manually measuring the sensor air gap with feeler gauges, helping technicians and boat owners restore the factory-specified clearance. It is intended for use on 2 cylinder Johnson and Evinrude outboard applications during ignition component servicing.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99544\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson Evinrude 2 Cylinder Outboard Motors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Sets sensor and stator charge coil air gap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282395742\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.5 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson and Evinrude 2 cylinder outboard motors\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99544 locator ring used for?\u003c\/strong\u003e The Sierra 18-99544 locator ring is used to set the sensor and stator charge coil air gap on Johnson and Evinrude 2 cylinder outboard motors during ignition system service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines does the 18-99544 locator ring fit?\u003c\/strong\u003e This locator ring is designed for Johnson and Evinrude 2 cylinder outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the sensor air gap need to be set with a tool like this?\u003c\/strong\u003e Accurate ignition timing depends on a consistent gap between the sensor and the stator charge coils, and the 18-99544 locator ring provides a repeatable spacing reference so this gap is set correctly rather than estimated by hand.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99544 locator ring weigh?\u003c\/strong\u003e It weighs 1.5 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a wear part or a setting\/service tool?\u003c\/strong\u003e The 18-99544 is a service tool (a locator ring) used to set the sensor and stator charge coil air gap rather than a running engine component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need this tool for a stator replacement on a 2 cylinder Johnson or Evinrude?\u003c\/strong\u003e Yes, when replacing or servicing the stator or sensor on a 2 cylinder Johnson or Evinrude outboard, the 18-99544 locator ring helps set the correct air gap during reassembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99544 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-99544 is sold under the Sierra brand as the part number for this locator ring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes with the Sierra 18-99544?\u003c\/strong\u003e The product is the locator ring itself, used as a setting gauge for the sensor and stator charge coil air gap on applicable 2 cylinder outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this locator ring be used on more than 2 cylinder models?\u003c\/strong\u003e The Sierra 18-99544 locator ring is intended for Johnson and Evinrude 2 cylinder outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat identifies this part when ordering?\u003c\/strong\u003e Order by Sierra part number 18-99544, described as the Locator Ring for Johnson Evinrude 2 cylinder outboard applications.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988446490843,"sku":"SIE-18-99544","price":122.35,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-553-4994_lg__96018.1558114043.500.750.jpg?v=1785189080"},{"product_id":"johnson-evinrude-105hp-jet-outboard-wiring-harness-18-99463-replaces-oem-584674-fits-1992-1994-60-degree","title":"Sierra Ignition Wire Harness 18-99463, Replaces 584674, Fits Johnson Evinrude 105HP 60 Degree Outboards","description":"\u003cp\u003eThe Sierra 18-99463 wire harness is an ignition\/electrical harness built for Johnson and Evinrude 105 HP 60-degree outboard engines. It is designed as a direct replacement for the original equipment harness, restoring proper electrical connections between the engine's ignition components after the factory harness becomes worn, corroded, or damaged. The harness uses copper conductors for reliable current flow and long service life in the marine electrical environment. Because it is engineered to the same connection points as the harness it replaces, it allows for a straightforward swap without needing to rework the boat's existing wiring layout.\u003c\/p\u003e\u003cp\u003eThis harness is intended for Johnson and Evinrude 105 HP JET and JET V\/VRO 60-degree outboard applications, covering the model years noted below. Boat owners and marine technicians rely on this part to restore ignition wiring integrity on these specific outboard configurations rather than replacing the entire electrical system.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99463\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396428\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 105 HP JET, 60 Degree, 1992-1993\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 105 HP JET V\/VRO, 60 Degree, 1994\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 105 HP JET, 1994\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e584674\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the Sierra 18-99463 harness replace?\u003c\/strong\u003e The Sierra 18-99463 wire harness replaces OEM part number 584674, so it is a direct fit for engines that originally used that harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard engines fit the Sierra 18-99463 harness?\u003c\/strong\u003e This harness fits Johnson and Evinrude 105 HP, 60-degree outboards, including JET models from 1992-1993 and JET \/ JET V\/VRO models from 1994.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99463 harness fit 1994 Evinrude JET V\/VRO 105 HP outboards?\u003c\/strong\u003e Yes, the Sierra 18-99463 harness is designed to fit the Johnson\/Evinrude 105 HP JET V\/VRO, 60-degree outboard for the 1994 model year.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99463 harness made of?\u003c\/strong\u003e It uses copper conductors, chosen for reliable electrical conductivity in the marine ignition system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99463 wire harness weigh?\u003c\/strong\u003e The harness weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99463 harness a genuine or aftermarket part?\u003c\/strong\u003e Sierra manufactures the 18-99463 harness as a marine aftermarket replacement engineered to fit in place of OEM part 584674.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness fit a 105 HP model that isn't a JET version?\u003c\/strong\u003e The Sierra 18-99463 harness is confirmed to fit Johnson\/Evinrude 105 HP JET and JET V\/VRO 60-degree outboards; fitment outside those JET configurations is not specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when you order the 18-99463 harness?\u003c\/strong\u003e Ordering the Sierra 18-99463 gets you the wire harness assembly itself, built to replace OEM part 584674.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the Sierra 18-99463 harness be installed as a straightforward swap?\u003c\/strong\u003e Yes, since it is built to the same connection points as the OEM 584674 harness it replaces, it installs in place of the original wiring without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99463 harness?\u003c\/strong\u003e The UPC for this part is 808282396428.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988446589147,"sku":"SIE-18-99463","price":269.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-4674_lg__16887.1558114654.500.750.jpg?v=1785188181"},{"product_id":"sierra-18-99594-internal-engine-wiring-harness-for-johnson-evinrude-sea-drive-2-6l-6-cyl-replaces-oem-583035-fits-1986-1987-150-155-175-hp","title":"Sierra Marine Internal Engine Wiring Harness 18-99594 - Replaces OEM 583035 for Johnson Evinrude Sea Drive 2.6L 150-175 Hp","description":"\u003cp\u003eThe Sierra 18-99594 is an internal engine wiring harness built for Johnson Evinrude outboards, using a round plug connector design to route electrical signals between the engine's internal components. It is engineered as a direct replacement for the original equipment harness on the Sea Drive 2.6L 6 cylinder powerhead, restoring proper electrical continuity where a factory harness has become brittle, corroded, or damaged from heat and vibration over time. The harness uses copper conductors for reliable current and signal transfer, matching the electrical performance expected of the original wiring.\u003c\/p\u003e\u003cp\u003eThis harness is intended for outboard owners and marine technicians performing an engine rebuild, electrical troubleshooting, or a preventive wiring replacement on applicable Johnson Evinrude powerheads. Because internal engine harnesses are routed through tight compartments and connect directly to ignition and sensor components, correct fitment to the engine's displacement, cylinder count, and horsepower rating is essential before installation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99594\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 583035\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282398620\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine:\u003c\/strong\u003e Johnson Evinrude Sea Drive 2.6L 6 Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Horsepower:\u003c\/strong\u003e 150 Hp, 155 Hp, 175 Hp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Years:\u003c\/strong\u003e 1986-1987\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson Evinrude Sea Drive 2.6L, 6 Cylinder\u003c\/li\u003e\n\u003cli\u003e150 Hp, 155 Hp, and 175 Hp engines, 1986-1987\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e583035\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99594 harness fit?\u003c\/strong\u003e The Sierra 18-99594 internal engine wiring harness fits Johnson Evinrude Sea Drive 2.6L, 6 cylinder engines rated at 150 Hp, 155 Hp, and 175 Hp for the 1986-1987 model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99594 harness a direct OEM replacement?\u003c\/strong\u003e Yes, the Sierra 18-99594 is designed to replace OEM number 583035 on applicable Johnson Evinrude engines, restoring the original electrical connections without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the connector style used on this harness?\u003c\/strong\u003e This harness uses a round plug internal engine connector, matching the original Johnson Evinrude connector configuration on the Sea Drive 2.6L 6 cylinder powerhead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material are the conductors made of in the 18-99594 harness?\u003c\/strong\u003e The Sierra 18-99594 harness uses copper conductors for reliable electrical signal and current transfer between engine components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99594 harness weigh?\u003c\/strong\u003e The Sierra 18-99594 internal engine harness weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-99594 cross-reference to?\u003c\/strong\u003e Sierra part 18-99594 replaces OEM number 583035 on Johnson Evinrude Sea Drive 2.6L 6 cylinder engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness work on other horsepower Johnson Evinrude models outside 150-175 Hp?\u003c\/strong\u003e The Sierra 18-99594 is specified for 150 Hp, 155 Hp, and 175 Hp Johnson Evinrude Sea Drive 2.6L 6 cylinder engines from 1986-1987; fitment outside this range is not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this harness suitable for an engine rebuild?\u003c\/strong\u003e Yes, the 18-99594 internal engine harness is commonly installed during an engine rebuild or wiring restoration on applicable Johnson Evinrude powerheads.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99594 harness include the full internal engine wiring or just a section?\u003c\/strong\u003e The Sierra 18-99594 is the complete internal engine harness with round plug connector for the Johnson Evinrude Sea Drive 2.6L 6 cylinder engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC identifies the Sierra 18-99594 harness?\u003c\/strong\u003e The Sierra 18-99594 internal engine harness is identified by UPC 808282398620.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988446818523,"sku":"SIE-18-99594","price":277.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-3035_lg__11449.1722500840.500.750.jpg?v=1785188822"},{"product_id":"sierra-18-99565-internal-engine-wiring-harness-for-johnson-evinrude-outboards-round-plug-connector","title":"Sierra Johnson\/Evinrude Round Plug Internal Engine Wiring Harness 18-99565","description":"\u003cp\u003eThe Sierra 18-99565 is an internal engine wiring harness built for Johnson\/Evinrude outboards that use a round plug connection. It carries the engine's electrical circuits between the powerhead components and the main wiring connector, providing a direct replacement path when an original harness has become corroded, cracked, or damaged from heat and vibration over time. The harness uses copper conductors for reliable electrical conductivity and is terminated with a DIN-style connector to mate with the round plug interface found on compatible Johnson\/Evinrude engines.\u003c\/p\u003e\u003cp\u003eCopper wiring resists corrosion better than lower-grade alloys and helps maintain consistent voltage delivery to ignition and charging components, which is critical for dependable starting and running on the water. Because this harness routes internally through the engine, it is intended for outboards originally equipped with a round plug wiring configuration rather than the later rectangular multi-pin connector style. Boat owners and marine technicians use this harness during engine rebuilds, electrical troubleshooting, or as a preventive replacement when a harness shows visible wear.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99565\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e DIN (round plug)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude outboard engines with round plug internal wiring configuration\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99565 wiring harness fit?\u003c\/strong\u003e The Sierra 18-99565 is built for Johnson\/Evinrude outboard engines that use a round plug internal wiring configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat connector type does this harness use?\u003c\/strong\u003e It terminates in a DIN-style round plug connector, matching the internal wiring interface on compatible Johnson\/Evinrude engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99565 harness weigh?\u003c\/strong\u003e This harness weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material are the wires made of?\u003c\/strong\u003e The Sierra 18-99565 harness uses copper conductors for reliable electrical conductivity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99565 is the Sierra manufacturer part number for this internal engine wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace this harness?\u003c\/strong\u003e Replacement is typically needed when the original engine harness shows corrosion, cracking, or heat and vibration damage that causes electrical faults or hard starting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this harness fit outboards with a rectangular multi-pin connector?\u003c\/strong\u003e No, the 18-99565 is designed for the round plug internal wiring configuration, not the rectangular multi-pin style.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation something a boat owner can do, or does it require a technician?\u003c\/strong\u003e Because the 18-99565 routes internally through the engine, installation typically involves engine teardown and is commonly performed by a marine technician or an experienced DIY mechanic during a rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat electrical systems does this harness connect?\u003c\/strong\u003e The Sierra 18-99565 carries the engine's ignition and charging circuits between the powerhead components and the main engine wiring connector.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy choose copper wiring over other materials?\u003c\/strong\u003e Copper resists corrosion and maintains consistent voltage delivery better than lower-grade wire alloys, which supports dependable starting and running.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988446851291,"sku":"SIE-18-99565","price":155.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-413-3771_lg__55422.1558113554.500.750.jpg?v=1785188951"},{"product_id":"engine-adapter-harness-for-mercury-mariner-controls-to-johnson-evinrude-outboards-sierra-18-99689","title":"Sierra Engine Adapter Harness 18-99689 - Mercury to Johnson Evinrude Control Adapter","description":"\u003cp\u003eThe Sierra 18-99689 is an engine adapter harness built to connect a Mercury engine to a Johnson Evinrude control setup. It allows the wiring interface between the two systems to line up correctly so the control side and the engine side can communicate without cutting, splicing, or re-pinning the original harness runs. This is a common need on boats where the engine and the control box come from different manufacturers and the factory harness connectors do not natively match.\u003c\/p\u003e\u003cp\u003eThe harness is built with copper conductors for reliable electrical continuity across the connection points, which matters for control signals and engine monitoring circuits that need a clean, low-resistance path. It is supplied as a single adapter harness (one unit), ready to install between the existing Mercury engine wiring and the Johnson Evinrude control wiring.\u003c\/p\u003e\u003cp\u003eBecause this is an adapter rather than a full replacement harness, it is intended for the specific job of bridging a Mercury engine to Johnson Evinrude controls, and it should be matched against your existing wiring ends before ordering to confirm connector compatibility.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99689\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury engine to Johnson Evinrude control adapter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eDesigned to adapt a Mercury engine to a Johnson Evinrude control setup.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99689 adapter harness do?\u003c\/strong\u003e It connects a Mercury engine's wiring to a Johnson Evinrude control setup, letting the two systems interface without modifying the original harness ends.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99689 harness made of copper?\u003c\/strong\u003e Yes, the conductors in the Sierra 18-99689 engine adapter harness are copper, which provides a reliable low-resistance connection for engine and control signals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99689 weigh?\u003c\/strong\u003e The Sierra 18-99689 engine adapter harness weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many harnesses come in the package?\u003c\/strong\u003e The Sierra 18-99689 is supplied as a single adapter harness, a unit count of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this harness be used with any control box other than Johnson Evinrude?\u003c\/strong\u003e The Sierra 18-99689 is built specifically to adapt a Mercury engine to a Johnson Evinrude control setup, so it is intended for that pairing rather than other control brands.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to cut or splice wires to install the Sierra 18-99689?\u003c\/strong\u003e No, it is designed as a direct adapter harness between the Mercury engine wiring and the Johnson Evinrude control wiring, without requiring the original harnesses to be cut or spliced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the Sierra 18-99689 fit my Mercury engine's existing wiring?\u003c\/strong\u003e The Sierra 18-99689 is built to interface Mercury engine wiring with Johnson Evinrude controls, but connector ends should be checked against your existing harness before ordering since specific engine wiring configurations can vary.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is the Sierra 18-99689?\u003c\/strong\u003e It is classified within the Evinrude outboard electrical system category as an engine adapter harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99689 an OEM part or an aftermarket part?\u003c\/strong\u003e The Sierra 18-99689 is Sierra's branded adapter harness for bridging Mercury engine wiring to Johnson Evinrude controls.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the main use case for this adapter harness?\u003c\/strong\u003e It is used when a boat's Mercury engine needs to communicate with a Johnson Evinrude control box, bridging the wiring interface between the two brands.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988447473883,"sku":"SIE-18-99689","price":222.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-421-4402_lg__67810.1558111312.500.750.jpg?v=1785188949"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/collections\/CDI-933-4051_lg__31676.1558113255.500.750.jpg?v=1785356918","url":"https:\/\/www.goodvibesmarina.com\/collections\/gvcat-engine-parts-systems-sensors-switches-wiring-harnesses-engine.oembed?page=4","provider":"Good Vibes Marina","version":"1.0","type":"link"}